alleryStart learning →A 900 kg car rounds a 600 m radius curve on level ground at 25.0 m/s. What centripetal force does this require?
A37.5 N
B375 N
C938 N
D13500 N
Answer & Solution
Correct answer: C. 938 N
1. Use F_c = m v^2 / r.
2. F_c = (900 kg)(25.0 m/s)^2 / 600 m = (900)(625) / 600.
3. F_c = 562,500 / 600 = 937.5 N, which rounds to 938 N.
_Source: OpenStax Physics (CC BY 4.0), Ch 6 "Circular and Rotational Motion", section 6.2 Uniform Circular Motion_
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