# Physics

Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec.
Compare impulse they received in stopping. Would that be 70 * (0-20)for yellow car
Green car it would be 70 * (0-20)

How do I calculate average force exerted on each driver?

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1. Is the average force found by F = the mass times the acceleration which is 9.8

Thank you-

I'm so confused I really don't know where or what to try next

Thank you

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posted by Annie

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