A car that is 8 times heavier than a motorcycle is moving at a speed which is just 1/2 the speed of the motorcycle. What will be the amount of work done required to stop the car as compared to that of a motorcycle?
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Answer:
1/2.
the kinetic energy used to Stop the car will be twice the amount to that of the motorcycle
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The amount of work done to stop the car as compared to motor cycle is equal to 2times
Explanation:
the work done to stop the car is actually equal to the kinetic energy of the car
For the car
Let us consider the mass to be 8m
The velocity is equal to v/2
The work done to stop the car is equal to 0.5 x 8m x v²/4 = mv²
For the motor cycle
The velocity is equal to v
The mass is equal to m
The work done to stop the entire motorcycle is equal to mv²/2
Hence the amount of work done to stop the car as compared to the motorcycle is double
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