WAEC Physics 2018 Objective — Question 7
Question 7 of 50 from the West African Examinations Council (WAEC) Physics 2018 Objective paper, with the correct answer and a full explanation.
Advertisement
A body of mass m moving round a circle of radius r with a uniform speed v experiences a centripetal force F. The work done by the centripetal force on it is
- A. Fv
- B. zeroCorrect
- C. Fmr
- D. Frlm
Explanation
The centripetal force is always directed perpendicular to the velocity (towards the centre), so it does no work on the body.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.