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im having trouble with some old physics revison. I just cant remember it.

if you can help out with some of the questions please do.

Oh try to include working out, formulas and diagrams

1.A bicyclist accelerates from 1ms-1 for 10s and covers 110. calculate the magnitude of the runners acceleration.

2.A storman pushes a 100kg crate with a force of 100N. If the firction opposing the man is 50N calculate

a)the magnitude of the net force on the crate.

b)the magnitude of the accelaration of the crate.

3.If a 5kg rock is dropped from a 50m high cliff calculate the.

a)time taken to hit the ground

b)speed of the rock on hitting the ground.

4.A billiard ball travelling at 1.5.ms-1 due east collides with the cushion of the billiard table and rebounds at the same speed but now heads due south.

a) If the collision and consequent change in direction took just 0.1s, calculate the balls acceleration.

b)Calculate the size of the force that the ball exerted on the cushion.

Thanks for all your help