A car is moving 28.5 m/s when it sees a policeman. It slows to 15.0 m/s in 2.37 s,
then drives at a constant speed for 8.25 s.
How far does the car travel in the problem?
(Unit = m)
I need help please help me

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When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply