Question

For How Long should a force of 100N work on a body of 20KG at rest so that it acquires a velocity of 100m/s??




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Answer 1

Answer:

20 second

Explanation:

The answer...........

100×20÷100=20 second

Answer 2

Answer:

20 second

Explanation:

So acceleration of the body can be calculated as:

F = ma

F = 100 N and m = 20 kg

a = 100/20 = 5 m/s2

Since, the force is acting constantly over the body, the acceleration is uniform; the equations of motion can be applied:

v = u + at

Where v = 100 m/sec, a = 5 m/s2 and u = 0 (rest).

t = v/a = 100/5 = 20 sec

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