Question

The velocity-time graph of an object of mass 10 kg moving along a straight line is shown in Fig. Calculate the force acting on the object by using the graph.

Answer 1

We know, F = ma

F = `(m xx v - u)/t`

F = `m xx "(Final velocity-initial velocity)"/"Time"`

= `10 xx ((30 - 10))/8`

= `20/8`

2.5 ms⁻²

We know, Force = mass × acceleration

Substituting, we get,

F = 10 × 2.5 = 25 N

Hence, the force acting on the object is 25 N.