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jasenka [17]
3 years ago
8

A force of 20 N acts acts on an object of 4.0 kg mass that is initially at rest. What is the resulting acceleration of the objec

t? How far does the object travel in 6 .0 seconds?
Physics
1 answer:
ki77a [65]3 years ago
4 0

Answer:

Explanation:

Acceleration = Force/ mass = 20/4 = 5 m/s².

acceleration a = 5 m/s² , initial velocity u = 0 , time t = 6 s

S = ut + 1/2 a t² = 0 + 1/2 x 5 x 6² = 90 m .

distance traveled = 90 m.

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<u>The question does not provide enough information to complete the answer, so I'll assume the needed data to help you to solve your own problem</u>

Answer:

<em>The fly should need to move at 9,534.6 m/s to have the same kinetic energy as the automobile</em>

Explanation:

<u>Kinetic Energy </u>

Is the capacity of a body to do work due to its speed and is computed by

\displaystyle K=\frac{mv^2}{2}

We are not given enough data to compare the kinetic energy of the fly with that of the automobile. We'll assume the following characteristics:  

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\displaystyle K_a=\frac{(500)10^2}{2}

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\displaystyle \frac{m_fv_f^2}{2}=25,000

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\displaystyle v_f=\sqrt{\frac{2(25,000))}{m_f}}

\displaystyle v_f=\sqrt{\frac{50,000}{0.00055}}

v_f=9,534.6\ m/s

The fly should need to move at 9,534.6 m/s to have the same kinetic energy as the automobile

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A subway car moves at a constant speed of 10 m/s over a period of 10 s. What is the instantaneous speed halfway through this mot
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