Question

A climber throws a first aid kit to a fellow climber:

A. It goes upward
B. It falls vertically
C. It accelerates
D. It hovers

Answer 1

The acceleration of a rock thrown straight upward is approximately 9.8 m/s² downward, both on the upward and downward paths. The velocity of the rock is zero at the peak, and the direction of velocity changes after reaching the highest point.

Step-by-step explanation:

The acceleration of an object in free fall, such as a rock thrown straight upward, is due to the force of gravity. This acceleration is constant and does not depend on the object's velocity or direction of motion. When the rock is thrown upward, it slows down until it reaches its peak, at which point its velocity is zero. However, its acceleration remains constant at approximately 9.8 m/s² downward, both on the way up and on the way down. During the flight, the velocity changes direction after reaching the top of the trajectory, transitioning from an upward velocity to a downward velocity.