Physics help please!!!? its very urgent!

Posted on 2016-10-13 18:37:00 in Physics by MORGAN

A steel ball is dropped onto a hard floor from a height of 1.70 m and rebounds to a height of 1.55 m. (Assume that the positive direction is upward.) 

(a) Calculate its velocity (in m/s) just before it strikes the floor. 

(b) Calculate its velocity (in m/s) just after it leaves the floor on its way back up. 

(c) Calculate its acceleration (in m/s2) during contact with the floor if that contact lasts 0.0800 ms. 

(d) How much (in m) did the ball compress during its collision with the floor, assuming the floor is absolutely rigid? 

Any and all help would be appreciated!! Thank you in advance for your help! I'll award 10 pts for the correct answer!

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