Question

The velocity-time graph of a ball of mass 30 g moving along a straight line is given in the figure. The force that brings the ball to rest will be:

Answer 1

Answer:

0.03 N

Explanation:

as given in the question

final velocity v = 0

at t=0 , initial velocity u = 5 m/s ( we can see in the graph )

time t = 5 sec

now acceleration a = v-u/ t

  a = 0 - 5 / 5

 a = -1 m/s^2

put this value of a in F = ma

 F =  (30/1000) * ( - 1)

   =  (- 0.03) N

here the sign of - means that the force is applied on the opposite direction to the motion