Question

The speed-time graph of a body having a mass of 100 g moving along a straight line path is shown here. Find the force acting on the body.

Answer 1

As we know slope or speed time graph gives acceleration so we can find the acceleration of the body.
a=(v-u)/t= (10-0) /( 4-0)= 5/2 = 2.5ms^-2
Massof the body is = 100 g= 0.1kg
Forece= mass x acceleration.
Force= 0.1 x 2.5 = 0.25 N