Physics
A particle is thrown vertically upward. When it reaches the highest point, it has

A downward velocity
A downward acceleration
An upward acceleration
A horizontal velocity

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Physics
Should cars have bumpers that collapse under impact?

Yes, since the offending car should get damaged and pay for the mistake
No, since the colliding car would then ram into the occupants and kill them
Yes, since they help to absorb the impact of a collision and keep the occupants safe
No, since it would be very expensive to get the car repaired

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