Question

39. A force of 100 N acts on a ball moving
on a surface. The force of friction that
must act between the surface of the ball
and the surface so that the ball keeps on
moving with constant velocity over the
surface must be *
a. Zero
b. 100 N
c. 200 N
d. 300 N
​

Answer 1

I think option (b) is correct.......

Answer 2

Answer:

(b)

Explanation:

In order to move the ball with the constant velocity the force must be balanced (F=0)

So, friction force will be 100N