Question

For how long should a force of l00N act on
a body of mass 20kg so that it aquires
a velocity of 25m/s.​

Answer 1

Answer:

Required time = 5 s

Explanation:

Given :

Force F = 100 N

mass m = 20 kg

Initial velocity  u = 0

Final velocity v = 25 m/s

F = $\frac{m (v - u)}{t}$

∴ t = $\frac{m(v - u)}{F}$ = $\frac{20 ( 25 -0)}{100}$ = 20 x 25/100 = 5 s

The force should act for 5 seconds