A tennis ball rolls off the edge of a tabletop of height0.710 m above the floor

Question

A tennis ball rolls off the edge of a tabletop of height0.710 m above the floor and strikes the floor at a point ahorizontal distance 1.70 m from the edge of the table. You canignore air resistance. Find the magnitude of the initialvelocity. Take the free fall acceleration to beg = 9.80 m/s. A tennis ball rolls off the edge of a tabletop of height0.710 m above the floor and strikes the floor at a point ahorizontal distance 1.70 m from the edge of the table. You canignore air resistance. Find the magnitude of the initialvelocity. Take the free fall acceleration to beg = 9.80 m/s. Find the magnitude of the initialvelocity. Take the free fall acceleration to beg = 9.80 m/s.

Explanation / Answer

height h = 0.710 m

horizontal distance R = 1.70 m

the magnitude of the initial velocity v = ?

free fall acceleration g = 9.80 m/s^2

time taken to reach the ground from the table t = [ 2h/ g ]

                                                                           =0.38 s

We know R = v t

From this v = R / t

                   = 4.465 m/ s

                                                                                                        

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