A ball is thrown horizontally from a 63.0 m high building with a speed of 32.0 m/s.What is the vertical component of the velocity when it hits the ground?
A)35.2 m/s
B)47.5 m/s
C)32.0 m/s
D)65.0 m/s
E)24.8 m/s

Question

Quizplus · Accepted Answer

The vertical component of the velocity is the same as the initial vertical component of the velocity, which is 0 m/s. The ball is thrown horizontally, so it has no initial vertical velocity. The only vertical velocity it has is due to gravity, which is 9.8 m/s^2. The ball falls for 63.0 m, so its vertical velocity when it hits the ground is:v = u + atv = 0 m/s + (9.8 m/s^2)(63.0 m)v = 617.4 m/sThe vertical component of the velocity is 617.4 m/s, which is closest to choice A, 35.2 m/s.

A Ball Is Thrown Horizontally from a 63