Solve the Problems

Calculate the force required to change the velocity of an object of mass 8 kg from 4 ms^-1 to 6 ms^-1 in 2 second.

Information from the question:

Mass of the object = 8 kg.

Initial velocity of the object = 4 ms^-1.

Final velocity of the object = 6 ms^-1.

Time taken to change the velocity = 2 seconds.

As we know from Newton’s second law that,

Where F is the force require to produce acceleration of ‘a’ on a body of mass ‘m’.

Hence we require acceleration to calculate how much force is required and acceleration is change in velocity in per unit time. So for acceleration,

Where v is final velocity, u is initial velocity and t is time taken by the object.

So, this implies acceleration

Force required for producing acceleration,