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A body of mass 0.40 kg moving initially with a constant speed of 10 m s^–1 to the north is subject to a constant force of 8.0 N

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asked Feb 23, 2018 in Science by paayal (26,720 points) ● 4 ● 6 ● 52

A body of mass 0.40 kg moving initially with a constant speed of 10 m s–1 to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t = –5 s, 25 s, 100 s.

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answered Feb 23, 2018 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 26
 
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Mass of the body, m = 0.40 kg
Initial speed of the body, u = 10 m/s due north
Force acting on the body, F = –8.0 N
Acceleration produced in the body,

As per the first equation of motion, for t = 30 s, final velocity is given as:

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