Proj Motion EX 10

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Helena Dedic

A ball rolls of a 1 m-high table and lands 1.6 m along the floor. Find its initial speed and the time of flight.

Solution:

TOP

The ball rolls along the table with horizontal velocity. When the ball leaves the table, the initial velocity is horizontal so that and . We know that = 1.6 m and = -1.0 m. We can write:

Eq. 1 (a)
Eq. 2 (b)


Solve equations (a) and (b) for initial velocity, , and time of flight, t.