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?

(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)

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.