Question

For this question, two statements are given- one labelled Assertion (A) and the other labeled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below Assertion (A): if the force is applied in the direction of motion of the object, its speed decreases. Reason (R): a force can change the speed of moving object.

a) Both A and R are true and R is correct explanation of the assertion
b) Both A and R are true but R is not the correct explanation of the assertion.
c) A is true but R is false.
d) A is false but R is true.​

Answer 1

d) A is false but R is true.

• When a force acts in the same direction of motion, then the speed of the object will increase as a result of this force. On the other hand, if a force is applied in the opposite direction from the direction of motion, then the speed will decrease.
• Hence, the assertion is false.
• However, a force does have an effect on the speed of a moving object and hence the reason is correct.