1 Mark Question
Question 1 : Is it possible to have an accelerated motion with a constant speed? Explain.
Answer : Yes, the velocity of a particle in a uniform circular motion is variable or the circular motion is accelerated even though the speed of particle is uniform.
3 Marks Questions
Question 2 : With reference to their direction of action, how does a centripetal force differ from a centrifugal force?
Answer : With reference to their direction of action, centripetal force is directed towards the centre of circle whereas centrifugal force is opposite to centripetal force (i.e., radially outward).
Question 3 : i) Which of the following remains constant in uniform circular motion, speed or velocity or both?
ii) Name the force required for uniform circular motion. State its direction.
Answer : i) Speed remains constant in uniform circular motion.
ii) Centripetal force is required for uniform circular motion.
Centripetal force is directed towards the centre.