Question

Choose the correct statement
a) If net force acts in the direction of motion then the speed of an object moving with constant speed also increases.
b) If the net force acts in a direction opposite to the motion then it either slows down the object or brings it to a stop.
c) If the net force acts in the direction of motion then it either slows down the object or brings it to a stop.
d) Both a & b are true​

Answer 1

d. Both a and b are true

Explanation:

Because if net force acts in the direction of motion then the speed of an object moving with constant speed also increases.

eg:

if we push a moving ball in its direction of motion at its back it will move faster.

Also If the net force acts in a direction opposite to the motion then it either slows down the object or brings it to a stop.

eg:

if we give a force to a moving ball in opposite direction it will stop.

best example is the friction force which opposes the motion always and it cannot be zero.

a ball automatically stops because of this.