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suppose you have 2 cars, and the larger one is twice as massive as the smaller one. If you and a friend push on them so that their accelerations are equal, how must the forces applied to the cars compare?
a. the force on the larger car is equal to that on the smaller car.
b. the force on the larger car is 1/2 that on the smaller car.
c. the force on the larger car is twice that on the smaller car.
d. the force on the larger car is more than three times that on the smaller car.

Using the equation F = m a, you should be able to figure this out.

If the accleration "a" is the same for both cars, what happens to F when m doubles?

gets larger?

Yes, the force must double

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