Question

A body of mass100g is initially in the state of rest and it’s velocity is increased to 100m/s

in 100m. Calculate force required (in Newton) for this increase in velocity​

Answer 1

Given:-

☆Initial velocity(u)=0 (as it was at rest initially)

☆Final velocity(v)=100m/s

☆Distance covered(s)=100m

☆Mass of the body(m)=100g

=>100/1000

=>0.1kg

To find:-

☆Force(F)

Solution:-

By using the 3rd equation of motion,we get:-

=>v²-u²=2as

=>(100)²-0=2×a×100

=>10000=200a

=>a=10000/200

=>a=50m/s²

Thus,acceleration of the body is 50m/s².

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Now,by Newton's 2nd law of motion,we get:-

=>F=ma

=>F=0.1×50

=>F=5N

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Thus,force required for this increase in velocity is 5N.

Answer 2

Explanation:

Hey dude

The force required to increase the velocity is 5N