2) A ball is thrown straight up into the air and passes a window 3 seconds after being released. It passes the same
window on its way back down 1.5 seconds later. What was the initial velocity of the ball?
Answer:
Hi, There! your Answer is Below!
10.29 m/s
Explanation:
a = -9.8
v = Vi - 9.8 t
h = 0 + Vi t - 4.9 t^2
-------------------------------
----------------------
at the top, t = .3 + 1.5/2 = 1.05
and v = 0 = Vi - 9.8(1.05)
so
Vi = 9.8(1.05) = 10.29 m/s
(Dont forget to mark thanks) :)
The initial velocity will be = u = 36.75 m/s
What are kinematics equations of motion ?
That describe the motion of point , bodies , and system of bodies without considering the force that cause them to move.
let that window at height h
it took 3 sec to reach that window and after crossing that window it took 1.5 second to come back to that same window
this implies , total time taken to to get to the top = 3sec + 1.5/2 = 3.75 sec
using equation of motion :
v = u + at
v= final velocity =0(at top )
u = initial velocity =?
a = acceleration , a=g ( acceleration due to gravity) = 9.8 m/s^2
t= 3.75 sec
0 = u - 9.8(3.75)
u = 36.75 m/s
initial velocity will be = u = 36.75 m/s
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HELP ME PLEASE !!
The scatter plot shows the winning time in the men's 200 m dash event in six consecutive Olympics.
What was the approximate winning time in the year 1992?
A) 20.2s
B) 20s
C) 19.8s
D) 10s
Answer:
B 20 sec
Explanation:
if you look at 1992 you can see that it is on 20 sec
The approximate winning time UK the 1992 Olympics as depicted by the scatterplot is 20 seconds.
The scatter plot illustrates the winning time on the y-axis of the graph and the Olympic year on the x - axis. The dots on the graph gives the point of intersection of a given x and y coordinate value. The winning time of the 1992 Olympics is represented by the dot located directly above 1992, the value of the dot on the y - axis gives the winning time.Therefore, the value of the dot on the y - axis is 20 seconds, hence, the winning time of the 1992 Olympics.
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If a river is flowing south at 4 m/s and you swim straight across (i.e. east) at 2 m/s; admittedly, you're going to drift a bit south. That said, calculate that distance that you drifted south from your starting point. The river is 16 m wide.
We have that the distance that you drifted south from your starting point is
[tex]\triangle y=32m[/tex]
From the question we are told that
a river is flowing south at 4 m/s
you swim straight across (i.e. east) at 2 m/s; admittedly
The river is 16 m wide
Generally the equation for the change in direction is mathematically given as
[tex]\triangle x = v_x t\\\\16=2*t\\\\t=8s[/tex]
Therefore
[tex]\triangle y = v_y t\\\\\triangle y=4*8\\\\\triangle y=32m[/tex]
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Convert 33 grams to ounces
(28.34 grams per ounce)
2.63 ounces
O 1.16 ounces
O 5.66 ounces
what is the answer to {36m= ? dm}
Answer:
360
Explanation:
just add a 0 when using dm
calculate the magnitude of the current through a resistor of 5ohm when the voltage across the resistor is 40v
Explanation:
[tex]\huge\fbox\colorbox{pink}{❥Answer♡}[/tex]
what is kinematics ??? -,- xD
Answer:
Basically, it's motion of a object.
100% smart.
Yup, 100% wrong.......
[tex]AnimeVines[/tex]
Answer:
the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.Compare with dynamics.
Explanation:
i looked it up it
the minute arm of the clock rotates in one complete Revolution in 60 seconds calculate the angular velocity?
Answer:
w (angular velocity = theta / t where 2 pi = 360 deg
For clock w = 1 rev / 60 sec = 2 * pi / 60 = pi / (30 sec)
Convert the following in to SI units without changing its values
a. 4000 g
b. 2.4 km
hi <3
i believe i explained this answer properly in my last answer but it would be 4kg and 2400m as these are the SI units for these values.
hope this helps :)
hi :D
i believe i explained this answer properly in my last answer but it would be 4kg and 2400m as these are the SI units for these values.
hope this helps :)
Finally , what is this kinematics ??
xD
Answer:
study of force and motion
Identify the parts of the body based on the medical terminology given:
1. mr. heart describes pain that is midline, superior to the chest but inferior to the chin.
2. miss triangle says that she has a ‘tweak’ that is superior to the waist, inferior to the breast bone, lateral to the umbilicus on the left side of the body on the anterior surface.
3. mr. square states that he has pulled a muscle, inferior to the buttocks, superior to the knee, medial to the right side of the body on the posterior surface.
4. miss circle complains of a sharp pain inferior to her ears, superior to the scapula at midline on the posterior side of her body.
5. mr. x says that he has numbness and tingling on the anterior side of his left arm, distal to the wrist.
6. mrs. diamond describes a throbbing pain on the posterior side of her body, inferior to her shoulder blades and superior to her waist.
7. miss arrow states that she has had a pain on the left side of her body, superior to her neck and inferior to her forehead, lateral to her nose.
8. mr. teardrop says that he has been bitten by a spider lateral to his umbilicus on the anterior aspect of his body, superior to his hip on the right side of his body.
9. miss eight describes a burning sensation on the posterior side of her body, lateral to the spine on the left side of the body inferior to the shoulder blade, inferior to the waist but anterior to the knee.
10. mr. four shows you a deep wound on the anterior side of his body, medial to the left hip, lateral to the umbilicus, inferior to the collarbone and anterior to the waist.
Answer:
1. Right hypochondriac region (upper, right).
2. Epigastric region (upper, middle).
3. Left hypochondriac region (upper, left).
4. Right lumbar region (middle, right).
5. Umbilical region (centre).
6. Left lumbar region (middle, left).
7. Right iliac region (lower, right).
8. Hypogastric region (lower, middle).
9. Left iliac region (lower, left).
Explanation:
1. Right hypochondriac region (upper, right)- Liver, gallbladder, right kidney, small intestine.
2. Epigastric region (upper, middle)- stomach, liver, pancreas, duodenum, spleen, adrenal glands
3. Left hypochondriac region (upper, left)- Spleen, colon, left kidney, pancreas
4. Right lumbar region (middle, right)- Gallbladder, liver, right colon
5. Umbilical region (centre)- Umbilicus, parts of the small intestine, duodenum
6. Left lumbar region (middle, left)- Descending colon and left kidney
7. Right iliac region (lower, right)- Appendix and cecum
8. Hypogastric region (lower, middle)- Bladder, reproductive organs, sigmoid colon
9. Left iliac region (lower, left)- Descending and sigmoid colon.
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When are theories constructed?
A. after data is collected from an experiment
B. after there is numerous data collected during the experiment
Hi, This is the answer...
Theories are constructed after there is numerous data collected during the experiment.
Hope it helps you...Pls mark brainliest if it helps you....(by Benjemin)
The correct answer is B.
Theories are constructed after there is numerous data collected during the experiment.
Theory construction is simply a process of formulating and bringing together different components of theories into a single form that is more meaningful.
These theories are usually supported by evidence (data) gathered from many experiments.
In addition, these theories may answer the basic questions of our universe such as;
how does nature work? and,why it exhibits certain characteristicsThus, from the given options, only option B matches the above explanations.
"theories are constructed after there is numerous data collected during the experiment"
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Convert the following in to SI units without changing its values
a. 4000 g.
b. 2.4 km
#A
[tex]\boxed{\sf 1kg=1000g}[/tex]
[tex]\\ \sf\longmapsto 4000[/tex]
[tex]\\ \sf\longmapsto \dfrac{4000}{1000}[/tex]
[tex]\\ \sf\longmapsto 4kg[/tex]
#B
[tex]\boxed{\sf 1km=1000m}[/tex]
[tex]\\ \sf\longmapsto 2.4km=2.4(1000)[/tex]
[tex]\\ \sf\longmapsto 2400m[/tex]
A machine has mechanical advantage 2, what does it mean
Answer:
Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N.
Source = Wikipedia
I Hope IT WILL HELP YOU A LOT.
A particle at t1= -2 seconds is at x1=4.8cm and at t2=4 seconds is at x2=9cm. Why can’t you calculate the average speed from this data?
Answer:
A particle at t1= -2 seconds is at x1=4.8cm and at t2=4 seconds is at x2=9cm. Why can’t you calculate the average speed from this data?
Explanation:
the average speed of the distance travelled is needed to be know and we were only given displacement.
The force of attraction between things that have mass called_____. Someone please help
If it takes Tanya 9.4 hours to get to her cousin's house while driving an average of 40 mph, how far away does her
cousin live?
Answer:
376 miles
Explanation:
speed = distance / time
therefore distance = speed * time
distance = 40 miles/hr * 9.4 hr
then
distance = 375 miles
If an object is moving with a constant velocity then according to Newton's first law:
A- it will continue with this velocity only if a net external unbalanced force acts.
B- it will change its velocity if a net unbalanced external force is applied.
С- it will continue with its velocity as external unbalanced force acts.
D- it will continue with its velocity as friction only acts if an external unbalanced force is applied.
What is the force on a 1,000 kg elevator that is falling freely at
25 m/s?
Explanation:
Force=mass*acceleration
Mass=1000kg
Acceleration=25m/s
F=1000*25
F=25000N
An artist creates a solid sculpture made from 7.10 kg of tin. She wishes to create an identical sculpture, using the same mold used to make the original, out of solid lead. What is the mass (in kg) of the lead sculpture? (The density of tin is 7.26 ✕ 103 kg/m3, and that of lead is 11.30 ✕ 103 kg/m3.)
Answer:
7.10(11.30/7.26) = 11.05 kg
Explanation:
dividing by the density of tin gives the volume of the sculpture
multiplying that volume by the density of lead gives the lead mass required.
Two identical billiard balls are rolling toward each other at the same speed. What will be true after they collide head–on?
Answer:
They will be moving away from each other at the same speed.
Explanation:
The final speed may be identical to the initial speed if the collision is perfectly elastic. The final speed will be zero if the collision is perfectly in-elastic.
In all likelihood, the final speed will be slightly slower than the initial speed.
A mountain climber at the peak ha ___________ energy.
A.gravitational potential
B. Elastic potential
C.Kinetic
When a driver hits the brakes, his car decelerates from 50m/s at a uniform rate of 2.0m/s^2. His car stops after covering some distance. How long does it take him to stop?
Please find attached photograph for your answer. Please do comment whether it is useful or not.
A rocket blasts off and accelerates upward from rest with a rate of 15.4 m/s2. Calculate the
distance it will rise in 22 seconds.
NEED HELP!!
From question we have,
Inital velocity(u) = 0Accleration(a) = 15.4 m/s²Time taken(t) = 22 secNow, from the second equation of motion;
s = ut + ½at² { where s = distance covered }Just put all the values provided in the question, in this equation;
s = ut + ½at²s = (0 × 22) + ½ × 15.4 × 22 × 22s = 15.4 × 11 × 22s = 15.4 × 242s = 3726.8 mTherefore, distance it will rise in 22 seconds will be 3726.8m
state Newton's laws of motion
Answer:
Newtons First Law (The Law of Inertia)- If an object is at rest it will stay at rest until a net force acts on it. If an object is in motion it will stay in motion until a net force acts on it.
Newtons Second Law (F=ma)- Force equals the mass of an object times it's acceleration.
Newton's Third Law- For every action there is an equal and opposite reaction.
hope this helps!
Bobo, the clown, wants to set the world record for the furthest range traveled by a clown shot out of a cannon. Write a sentence describing the cannon that Bobo would need to use to accomplish this feat. Be sure to include the necessary initial velocity and the required angle of the cannon. Score: 0 / 1
In the human cannonball act makes use of of a special type of "cannon" that more safely ejects a person who acts as the "cannonball"
The world record for the longest flight by a human cannonball is approximately 194 feet and therefore the human cannon catapult that Bobo would need is one that would be able to propel him with an initial velocity of more than 120 kilometer per hour (more than the speed of the current record holder) with the cannon directed at an angle 45 degrees above the horizonal
The reason the values given above are correct is as follows:
The world record of the furthest range of the human cannonball is 193 ft. 8.8 inches. The maximum claim for the furthest range of a human cannonball is 200 ft. 4 in. Therefore, to safely set the world record would be to reach a range of 194 feet
The speed with which the world record was accomplished (120 km/jhr) should be expected to be exceeded given, horizontal speed in free fall motion is constant (decreasing in the presence of drag), and the conditions are likely to be more or less similar
In order to reach the furthest range, R, at the possible speed, the angle of inclination of the "cannon" required is 45°, according to the range formula, which is given as follows;
[tex]Range, \ R = \dfrac{v^2 \times sin(2\cdot \theta)}{g}[/tex]
The maximum range is given where θ = 45, such that sin(2·θ) = sin(90°) = 1
A further range than the world record van be obtained using the above values
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What does it mean to maintain balance or
homeostasis?
The controlling and maintaining of the
internal environment of an organism.
Controlling what happens in the world around
you.
Standing on one foot with your eyes shut.
ube
Not watering your plant for four days.
A person takes a trip, driving with a constant speed of 90.5 km/h, except for a 28.0-min rest stop. The person's average speed is 73.2 km/h.
(a) how much time is spent on the trip?
(b) how far does the person travel?
We have a segment AC and B is in the middle. So AB + BC = AC because the segment is in pieces. Because B is a midpoint, AB = BC. We now have
AB + BC = AC sum of a segment is sum of its pieces
AB + AB = AC B is the midpoint, so AB = BC
2x + 2x = 3x + 20 putting in for AB (twice!) and AC
4x = 3x + 20 collect like terms
x = 20 subtract 3x on both sides.
So x=20
what is the difference between the pressure exerted by a solid and that by liquid?
Answer:
• Pressure inside liquids are due to the random movement of the liquid molecules and the weight of the liquid. The pressure inside solids occurs only due to the weight of the solid.
• The liquid pressure acts on the sides of the liquid as well as the bottom. The pressure due to solids only appears at the bottom of the solid.
ANALYZE
How does the distance traveled by the coin compare to its displacement after ten flips?
Answer:
The positive velocity occurs the instant the coin leaves our hand. It immediately begins slowing up until its upward velocity becomes zero at the maximum height. At this instant it begins to fall and its velocity increase in a negative direction. The velocity reaches its maximum negative value the instant before it touches your hand.