Question

Stunt car A and stunt car B are identical cars with the same mass of 35.9 kg. They are both traveling at 37.1 m/s. Stunt car A crashes into a hard concrete wall, whereas stunt car B crashes into a big soft mattress. They both come to a complete stop after the impact.Stunt Car A experiences a _____________________ over a _____________ of time. Stunt Car B experiences a _____________________ over a _____________ of time. Because of the force experienced by Stunt Car A, it will sustain ____________ damage than Stunt Car B.
The possible answers are: short period, large force, more, long period, small force, less.

Answer 1

Answer:

Stunt car A and stunt car B are identical cars with the same mass of 35.9 kg. They are both traveling at 37.1 m/s. Stunt car A crashes into a hard concrete wall, whereas stunt car B crashes into a big soft mattress. They both come to a complete stop after the impact.Stunt Car A experiences a LARGE FORCE over a SHORT PERIOD of time. Stunt Car B experiences a SMALL FORCE over a LONG PERIOD of time. Because of the force experienced by Stunt Car A, it will sustain MORE damage than Stunt Car B.

Explanation:

As we know that force is given as rate of change in momentum

so it is defined as

$F = \frac{dP}{dt}$

so here we know that both the cars are identical and both are moving with same speed so after coming to rest both the cars have same change in momentum

while Car A will experience more force because due to collision with concrete wall the time of collision is very small as compared to Car B

So Force on Car A is more than the force on Car B