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Anonymous Posted 12 years ago
Grammar

momentum

When you are in a car that is going very fast, about 150 mph, what is it that keeps your body stuck to your seat?

Is it momentum?

How would you say the following?

He was driving so fast my body was stuck in my chair because of the momentum.

Thank you!!!
  

Top answer

If the car is going at a constant speed, then it's gravity that keeps you in/on your seat. If there is rapid acceleration, then you are forced back in your seat by inertia.

— Fivejedjon

  • If the car is going at a constant speed, then it's gravity that keeps you in/on your seat.
  • If there is rapid acceleration, then you are forced back in your seat by inertia.
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4 Answers
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If the car is going at a constant speed, then it's gravity that keeps you in/on your seat.

If there is rapid acceleration, then you are forced back in your seat by inertia.
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Driving at a constant speed, however fast, does not cause that effect. In an accelerating car, the thing that keeps you stuck to your seat is an inertial force. Momentum is what throws you towards the windscreen if the car suddenly brakes.
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I see.

What if you are in a plane and in nosedives and you don't have your seat belt on and you fly up to the ceiling. What is that?

Thanks
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Is that momentum or inertia ?

Thanks
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