Projectile Motion - Downward Throw · PhysicsBowl 2010 #7

Physics · mechanics

Problem

A small object is thrown straight downward on Earth with an initial speed of

12.0 \frac{\text{m}}{\text{s}}

from a position 10.0m above the ground. Ignoring air resistance, the speed of the object when it reaches the ground is (A)

18.4 \frac{\text{m}}{\text{s}}

(B)

14.6 \frac{\text{m}}{\text{s}}

(C)

14.0 \frac{\text{m}}{\text{s}}

(D)

12.8 \frac{\text{m}}{\text{s}}

(E)

12.0 \frac{\text{m}}{\text{s}}