Question

you place your friend's birthday cake on the front passenger seat of your car. You opt...

you place your friend's birthday cake on the front passenger seat of your car. You opt not to put the seat belt on the cake. On your way to the party you slam on the brakes. What happens to the cake when the brakes are applied and why?

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Answer #1

The cake will slam on the windscreen.

When the car is moving, the cake is moving with the car with the same speed. Now when the brakes are applied the car is stopped suddenly. But the cake tries to move forward with the same speed. As a result, the cake will move while the car is still and slam to the windscreen. In another way, from Newton's first law, a moving object will move until a force is applied. So with brake applied, the car will stop, but as there is no force applied to the cake, it will move.

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