CAPE Physics Unit 1 · 2013 · Paper 1 · Question Q11
A car with mass, m, moves around a circular road of radius, r, at a constant speed, v. Which of the following statements is/are true?
I. The car's velocity changes and the magnitude of the acceleration is \frac{v^2}{r}.
II. There is no resultant force on the car since its speed is constant.
III. The resultant force on the car is outwards from the centre and equals \frac{mv^2}{r}.
- (A)I only
- (B)II only
- (C)II and III only
- (D)I and II only
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