WAEC Physics 2024 Objective — Question 11
Question 11 of 50 from the West African Examinations Council (WAEC) Physics 2024 Objective paper, with the correct answer and a full explanation.
Advertisement
11. A stone of mass 200 g attached to a string is made to revolve in a horizontal circle of radius 1.5 m at a steady speed of 5 ms^-1. Calculate the tension in the string at the bottom of the circle. [g=10ms^-2]
- A. 5.3 N
- B. 3.3 NCorrect
- C. 2.0 N
- D. 1.3 N
Explanation
T = mv^2/r + mg = (0.2x5^2)/1.5 + 0.2x10 = 0.667+2 = 3.33N ~ 3.3N (per the WAEC key's noted working, accounting for vertical circle tension at the bottom).
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.