A 0.5 kg stone whirls at 4 m/s in a circle of radius 2 m. Centripetal force?
A16 N
B1 N
C4 N
D8 N
Answer & Solution
Correct answer: C. 4 N
F = mv²/R = 0.5 x 16 / 2 = 4 N.
Related questions
A book rests on a desk. Why are weight and normal force not an action-reaction pair?Two blocks of 2 kg and 3 kg touch on a smooth desk. A 10 N push gives acceleration?A block slides down a smooth 30 degree incline. Its acceleration? (g = 10 m/s²)The same lift accelerates down at 2 m/s². Normal force on the 60 kg person? (g = 10)A lift carrying a 60 kg person accelerates up at 2 m/s². Normal force? (g = 10)The maximum safe speed of a car on a level curve is independent of?A car on a level road has µs = 0.5 and turn radius 20 m. Maximum speed? (g = 10)What supplies centripetal force for a car turning on a level road?