A car moving at 50 km/hr skids 20 m with locked brakes. How far will the car skid with locked brakes if it were traveling at 150 km/hr?

Name: A car moving at 50 km/hr skids 20 m with locked brakes. How far will the car skid with locked brakes if it were traveling at 150 km/hr?
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Question

Quizplus · Accepted Answer

The stopping distance is proportional to the square of the speed. If the speed triples from 50 km/hr to 150 km/hr, the stopping distance increases by a factor of 3^2 = 9. Therefore, the car will skid 20 m * 9 = 180 m.

A Car Moving at 50 Km/hr Skids 20 M with Locked