An autographed baseball rolls off of a 0.55 m high desk and strikes the floor 0.55 m away from the desk. How fas?
An autographed baseball rolls off of a 0.55 m
high desk and strikes the floor 0.55 m away
from the desk.
How fast was it rolling on the desk before
it fell off? The acceleration of gravity is
9.81 m/s
2
.
Answer in units of m/s
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Verified answer
Time to fall is t = sqrt(2*h/g) = sqrt(2*0.55/9.81) = 0.335s
so horizontal speed was v = x / t = 0.55m / 0.335s = 1.64 m/s