Question

A body of mass 2kg has a initial velocity 5m/s. A force acts on it for 4 seconds in the direction of motion.the final speed of the body is

Answer 1

Answer:

2F+5=final velocity.

Explanation:

We know that the body is of mass 2 kg and the force is given by the formulae of F=m(final velocity - initial velocity )/t. The force here acts for 4 seconds hence the time taken t = 4 seconds and the initial velocity of the body is 5 m/s.

So, on substituting the values we will get that F=2/4(final velocity - 5) or which on solving we will get that 2F+5=final velocity.