A 1500 kg car moving at 20 m/s is stopped by a constant braking force of 2500 N. What is the stopping distance?
Answer and explanation
Correct answer: C. m
- Step 1: Work done by the brakes equals the kinetic energy lost: .
- Step 2: m.
Answer
m.
Why not the others: m: The factor in the kinetic energy was left out. m: Momentum was used in place of kinetic energy. m: The quotient was inverted.
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