A stone is thrown vertically upward with a speed of 10 m/s from the edge of the cliff 65 m high. It reaches the ground sometime later(adsbygoogle = window.adsbygoogle || []).push({});

a) what is the acceleration and velocity at the highest point. (I got acceleration=9.8 m/s^2 and velocity=o)

b)What is the displacement for the freefall portion of the trip? (I got 0 m)

c) what is the final free fall velocity?

d) how long is the stone in freefall?

2)A car starts from rest and accelerates uniformily to a speed of 30 m/s in 10s. The driver maintains this speed for another 10s.

What is the displacement for the entire 20s trip?

Thanx a lot

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# Physics help on motion in 1-d please help

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