Question

Asmall ball rolls horizontally off the edge of a tabletop that is 1.20m high. It strikes the floor at a point 1.52m horizontally from the table edge. How long is the ball in the air? What is its speed at the instant it leaves the table?

Answer 1

Answer:

(a): The ball is in the air t= 0.49 sec.

(b): The speed of the ball in the instant it leaves the table is V= 2.44 m/s.

Explanation:

h= 1.2m

d= 1.52m

h= g*t²/2

t=√(2*h/g)

t=0.49 sec (a)

d= V*t

V= d/t

V= 2.44 m/s (b)