(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hello, i have an exam in two days and spent all day trying to solve mechanic questions. Theres 4 in total, i'm having extreme trouble do not have the sufficient time to spend as i have other topics to cover. Would you please be able to help me out. Thanks the questions are as follows.

1: The rear of a bicycle passes a point O on a road waith a velocity of 4 m/s and an acceleration of 2m/s2. Four seconds later the front of a car paases 0 with a velocity of 2m/s and an acceleration of 4m/s2. When and how far from O does the front of the car meet the rear of the bicycle?

2.A stone is dropped from the top of a cliff which is 100m high. At the same time another stone is vertically thrown upwards from the foot of the cliff woth a speed of 40m/s.AT what height and when do the stones meet?

3.A Balloon starts from rest on the ground and rises vertically with a constant acceleration of 2m/s2. After 8 seconds a stone is dropped from the bottom of the balloon. How long does it take the stone to reach the ground.

4. A stone is thrown verticaly upwards from a point with an initial speed of 50m/s. Three seconds later another stone is thrown vertically up from the same pont witha speed of 70m/s. How long after the first stone leaves the ground do the two stones meet? At what height above the ground do the 2 stones meet?

2. Relevant equations

Linear motion with constant acceleration equations

1. v= u + at

2 s=ut +1/2at(squared)

3. v(squared)=u(squared)+2as

3. The attempt at a solution

1. s1. ut +1/2at(squared)

=4t +1/2(2)t(squared)

=4t + t(squared)

I have no idea. please help

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# Mechanics problems involving velocity,acceleration and gravity

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