A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is
A)zero.
B)less than 30 m/s but larger than zero.
C)about 30 m/s.
D)more than 30 m/s.
E)more information needed for an estimate

Question

Quizplus · Accepted Answer

Neglecting air resistance, the horizontal component of the package's velocity remains constant due to Newton's first law of motion, as there are no horizontal forces acting on it. Therefore, the horizontal speed of the package just before it hits the ground remains approximately 30 m/s.

A Package Falls Off a Truck That Is Moving at 30