The front 1.20 m of a 1600 kg car is designed as a crumple, Ask an Expert

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Q1. The front 1.20 m of a 1600 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision.

If a car travelling 25.0 m/s stops uniformly in 1.20 m, how long does the collision last?

Q2. A ceiling fan with 82-cm-diameter blades is turning at 68 rpm. Suppose the fan coasts to a stop 30s after being turned off.

a.) What is the speed of the trip of a blade 10 s after the fan is turned off?

b.) Through how many revolutions does the fan turn as stopping?

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Category:- Physics
Reference No.:- M9165050

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