An object accelerates uniformly from rest to a speed of
50 meters per second in 5.0 seconds. The average speed of
the object during the 5.0-second interval is
A 5.0 m/s
B 10 m/s
C 25 m/s
D 50 m/s

Explanation:

Let

[tex]x_1[/tex] = distance traveled while accelerating

[tex]x_2[/tex] = distance traveled while decelerating

The distance traveled while accelerating is given by

[tex]x_1 = v_0t + \frac{1}{2}at^2 = \frac{1}{2}at^2[/tex]

[tex]\:\:\:\:\:= \frac{1}{2}(2.5\:\text{m/s}^2)(30\:\text{s})^2[/tex]

[tex]\:\:\:\:\:= 1125\:\text{m}[/tex]

We need the velocity of the rocket after 30 seconds and we can calculate it as follows:

[tex]v = at = (2.5\:\text{m/s}^2)(30\:\text{s}) = 75\:\text{m/s}[/tex]

This will be the initial velocity when start calculating for the distance it traveled while decelerating.

[tex]v^2 = v_0^2 + 2ax_2[/tex]

[tex]0 = (75\:\text{m/s})^2 + 2(-0.65\:\text{m/s}^2)x_2[/tex]

Solving for [tex]x_2,[/tex] we get

[tex]x_2 = \dfrac{(75\:\text{m/s})^2}{2(0.65\:\text{m/s}^2)}[/tex]

[tex]\:\:\:\:\:= 4327\:\text{m}[/tex]

Therefore, the total distance x is

[tex]x = x_1 + x_2 = 1125\:\text{m} + 4327\:\text{m}[/tex]

[tex]\:\:\:\:= 5452\:\text{m}[/tex]

your question:

P= 2/3(N/V)1/2mv^2 Solve for v

answer:

v=√2Vem

Answer:

0.4 meters per second I believe

Change in velocity per unit time.

Explanation

Acceleration is defined as rate of change of velocity w.r.t time.

[tex]\boxed{\sf Acceleration=\dfrac{dv}{dt}}[/tex]

Answer:

In physics, a transverse wave is a wave whose oscillation is perpendicular to the direction of propagation of the wave.

hope that helped.

In a transverse wave, the wiggles are up and down.

In a longitudinal wave, the wiggles are back and forth.

Answer:

a) kinetic energy = 130.2j

b) angular velocity when kinetic energy is doubled = 21.2rad/s

Answer:

-5.5m/s^2

Explanation:

Well first of all, we know that velocity is a vector, therefore acceleration is a vector. And since urkar is slowing down, the acceleration will be negative

V1 = 11m/s

V2 = 0m/s ( bcuz they said to a stop)

t = 2s

a = V2 - v1

- - - - - - - - - -

t

a = 0 - 11

- - - - - - -

2

= - 5.5ms^-2

Answer:

Explanation:

We have that  the the instantaneous speed is given as

[tex]v=15m/s[/tex]

From the Question we are told that

Calculate the instantaneous speed

Accelerates at

[tex]a=10 m/s2 \\\\t= 1.5 seconds.[/tex]

Generally the equation for the  instantaneous speed is mathematically given as

[tex]v=\frac{d}{t}[/tex]

Acceleration

[tex]a=\frac{v}{t}[/tex]

Therefore

[tex]v=10*1.5\\[/tex]

[tex]v=15m/s[/tex]

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the kinetic energies of the particles (atoms,molecule,or ions)that make up up a substance. kinetic energy tends to keep the particles moving apart.

the attractive inter molecular forces between particles that tends to draw the particles together.

Answer:

Answer (b)

Explanation:

Acceleration is the rate of change of velocity in time, therefore constant acceleration will be changing velocity in direct proportion to time and will have a linear plot on a velocity/time chart. This eliminates answer (d) which has an increasing acceleration in time

answer (a) has a negative slope so the acceleration would be considered negative

answer (c) has zero slope so acceleration is zero and velocity is constant.

answer (b) has the required positive slope and acceleration

Answer:

117.06 A

Explanation:

V = IR

2650 = 66(R)

2650/66 = R

40.15 = R

V = IR

4700 = I(40.15)

4700/40.15 = I

117.06 = I

We can define average velocity as:

av = (total distance travelled)/(total time)

Only using the above equation, we will find that she walked 807.3m due east.

The given information is:

The average velocity is 1.34 m/s due west.

(we can define west as the positive side and east as the negative side).

We know that first, she hikes 6.44km due west with an average velocity of 2.68 m/s.

To get the total time it took we write the equation:

2.68 m/s = (6,440m)/(time)

time = 6,440m/(2.68 m/s) = 2,402.9 seconds.

Then she hikes a distance D due east with an average velocity of 0.447 m/s, because she goes due east, we will write -D in the equations.

Now using the same equation as before, we can get the time as:

time' = -D/(-0.447 m/s) = D/(0.447 m/s)

Now the equation for the total average velocity will be:

1.34 m/s = (6,440m - D)/(2,402.9 s +  D/(0.447 m/s))

Now we need to solve this for D.

(1.34 m/s)*(2,402.9 s +  D/(0.447 m/s)) =  (6,440m - D)

(1.34 m/s)*(2,402.9 s) + (1.34 m/s)*(D/(0.447 m/s) =6,440m - D

(1.34 m/s)*(D/(0.447 m/s) + D = 6,440m - (1.34 m/s)*(2,402.9 s) = 3,229.1 m

D*(1 + (1.34m/s)/(0.447 m/s)) = 3,229.1 m

D*4 = 3,229.1 m

D =  3,229.1 m/4 = 807.3 m

We can conclude that she walked 807.3m due east.

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We have that the total distance traveled by the  backpacker is

[tex]d_t=5.6km[/tex]

From the Question we are told that

Total Average velocity [tex]V_{avg}= 1.34 m/s,[/tex]

Distance [tex]d=6.44 km[/tex]

First average velocity [tex]V_{1 avg}= 2.68 m/s,[/tex]

Second average velocity [tex]V_{2 avg}= 0.447 m /s[/tex]

Generally the equation for Total Distance  is mathematically given as

[tex]d_t=d_1+d_2\\\\V_tT_t=(v_1t_1)+(v_2t_2)[/tex]

Where

[tex]t_1=\frac{d_1}{t_1}\\\\t_1=\frac{6440m}{2.68}\\\\t_1=2400s[/tex]

Therefore

[tex]V_tT_t=(v_1t_1)+(v_2t_2)[/tex]

[tex]1.34(T_t)=(2.68(2400))+(-(0.447t_2))[/tex] ...(due to change in direction)

[tex]1.34t_1+1.34t_2=6440-0.447t_2[/tex]

[tex]t_2=1804s[/tex]

Hence, the distance covered by her is

[tex]d_t=d_1+d_2\\\\d_t=(2.68(2400))+(-(0.447(1804)))\\\\d_t=5625.612m[/tex]

[tex]d_t=5.6km[/tex]

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Answer:

a fad diet is basically a diet that was a trend or that was popular for a short amount of time and makes unreasonable claims for fast and very much wanted results

Explanation:

Answer

D)

Explanation:

Imagine throwing a ball upwards the ball will incress and then decrease make a arc shape.

The second graph represents the acceleration as a function of time of an object is thrown straight up, therefor the correct answer is option B

The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².

As given in the problem an object is thrown straight up and its acceleration  vs time graph is plotted

As we know that the acceleration due to gravity is constant and always acts towards the center of the earth, when the object is thrown straight up its acceleration would remain constant due to the acceleration due to gravity. The acceleration due to gravity is constant with a value of 9.81 m/s²

Thus, The second graph represents the acceleration as a function of the time an object is thrown straight up, therefor the correct answer is option B

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Answer:

The independent variable is that entered by the researcher - it does not depend on anything else in the equation

The dependent variable is the result obtained by applying the equation to the independent variable

One variable is entered by the researcher giving rise to the second variable.

In the study given the intensity depends on the average water temperature.

The independent variable is the water temperature and the dependent variable is the maximum strength of the hurricane

In scientific research processes there are several types of variables

 * Those that can be controlled or manipulated by researchers, these are called independient variable  

* The variables that are measured in the investigation are called dependent variables, these are influenced by the values ​​of the independent and intervening variables

* There is a third type of variable called intervening that affect the results but cannot be identified or controlled by the researchers.

Based on this definition for this case the independent variable must be temperature, even though the researcher cannot control it directly, he can measure its value.

The dependent variable is the intensity or maximum strength and the number of hurricanes that can be measured by the researcher and create a relationship between the intensity as a function of the gulf water temperature.

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D. Length of content.

Reliable sources need to be accurate, they need to make sense at the time they were created and the author needs to not be biased with their writing. It does not matter how long the content is as long as it is reliable.

Answer: c is the correct answer

Explanation:

Option C is the correct answer.

Definition of Science: A way of discovering and knowing about the world.

Science

Science can be defined as the knowledge and understanding of the natural and social world following a systematic methodology based on evidence.

The scientific methodology includes objective observation, measurement and data evidence.

Science is a system of observations and experiments used to gain knowledge about how the universe works. Observations describe how and why things happen the way they do. Experiments are investigations used to explain how the world works.

Hence option C represents the best definition.

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https://brainly.com/question/935949.

The velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s  

Let's evaluate every step

1. Step 1

[tex]v_{i}_{1}[/tex]: initial velocity at step 1 = 30.6 m/s

[tex]v_{f}_{1}[/tex]: final velocity at step 1

[tex]t_{1}[/tex]: time at step 1 = 1.70 s

[tex]a_{1}[/tex]: average acceleration at step 1

The average acceleration in this step is given by:

[tex] a_{1} = \frac{v_{f_{1}} - v_{i_{1}}}{t_{1}} [/tex]   (1)      

2. Step 2

[tex]v_{i}_{2}[/tex]: initial velocity of step 2 = [tex]v_{f}_{1}[/tex]

[tex]v_{f}_{2}[/tex]: final velocity at step 2    

[tex]t_{2}[/tex]: time at step 2 = 4.56 s

[tex]a_{2}[/tex]: average acceleration at step 2

The average acceleration is the following:

[tex] a_{2} = \frac{v_{f_{2}} - v_{i_{2}}}{t_{2}} [/tex]   (2)            

3. Step 3          

This step is given by the sum of step 1 and step 2

[tex]v_{f}[/tex]: final velocity after 6.26 s = 17.0 m/s = [tex]v_{f}_{2}[/tex]

t = t₁ + t₂ = 1.70 s + 4.56 s = 6.26 s  

The ratio of the average acceleration is:

[tex] \frac{a_{1}}{a_{2}} = 1.55 [/tex]  (3)

By dividing equation (1) into equation (2) we have:

[tex] \frac{a_{1}}{a_{2}} = \frac{\frac{v_{f_{1}} - v_{i_{1}}}{t_{1}}}{\frac{v_{f_{2}} - v_{i_{2}}}{t_{2}}} [/tex]

[tex] \frac{a_{1}}{a_{2}} = \frac{t_{2}(v_{f_{1}} - v_{i_{1}})}{t_{1}(v_{f_{2}} - v_{f_{1}})} [/tex]                

By solving the above equation for [tex]v_{f_{1}}[/tex] we have:

[tex]v_{f_{1}} = \frac{\frac{a_{1}}{a_{2}}v_{f_{2}}t_{1} + v_{i_{1}}t_{2}}{\frac{a_{1}}{a_{2}}t_{1} + t_{2}} = \frac{1.55*17.0 m/s*1.70 s + 30.6 m/s*4.56 s}{1.55*1.70 s + 4.56 s} = 25.6 m/s[/tex]

Therefore, the velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s.  

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I hope it helps you!

Answer:

The capacity for doing work.

Explanation:

It has the forms kinetic, potential, thermal, electric, nuclear or other forms of energy.

In physics, the ability to do work is referred to as energy. It can be of several types like thermal, electrical, chemical etc.

The capacity to perform work is known as energy in physics. Potential, kinetic, thermal, electrical, chemical, nuclear, and other types are all possible. As energy is transferred from one body to another, there is also heat and work. Energy is always categorized after it has been transferred based on its nature. As a result, heat transfer may result in thermal energy, whereas labor may result in mechanical energy.

Motion is a common feature of all energy types. Whenever a body is in motion, for instance, it contains kinetic energy. Even while at rest, a tensioned object like a spring or bow can move; this is because of the configuration of the object, which carries potential energy.

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Explanation:

the formula for momentum is denoted by p=mv where p is momentum, m is mass and v is velocity. thus, the velocity before impact would be 0.060 x 30 = 1.8 kg/ms

the second one would just be 0.060 x 20 0.72kg/ms

I'm not 100 percent sure this is correct but yeah

Answer:

[tex]thank \: you[/tex]

Answer:

For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement.

EXPLANATION:For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement.

Answer:

There is lots of evidence to support it, is the correct answer

The reason why evolution is regarded as a scientific theory is because there are lots of scientific evidences to support it.

Evolution refers to the scientific thinking that complex life forms came out of simple life forms. The complex sequence of events that occurred during the transformation of simple life forms to complex life forms are described by the theories of evolution.

The reason why evolution is regarded as a scientific theory is because there are lots of scientific evidences to support it.

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A. The S.I unit of mass is kg . therefore we have to convert 4000g into kg from gram

i.e 4000g = 4 kg

B. The S.I unit of length is meter. so we have to convert 2.4 km into meters,

i.e 2.4 km = 2400 m

#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]

Answer:

Hello,

The combustion of biomass can replace fossil fuels in conventional power plants, which is true.

I hope I helped you :)

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematic equations are a set of equations that can derive an unknown aspect of the motion of a body if the other aspects are provided.