Imagine an athlete is practicing shot-put using a 12-pound shot, and the athlete throws it 50 feet. The athlete then uses a 16-pound shot and throws it 40 feet. (A shot is a metal ball.) Which statement below is true?

Question

Athlete throwing a shot-put

(1 point)
Responses

The 12-pound shot A has the greater mass and the slower velocity because it is thrown 50 ft.
The 12-pound shot A has the greater mass and the slower velocity because it is thrown 50 ft.

The 16-pound shot B has the greater mass and the slower velocity because it is thrown 40 ft.
The 16-pound shot B has the greater mass and the slower velocity because it is thrown 40 ft.
Question 2
True or False: Kinetic energy increases with mass and with velocity.

KE = (1/2) x m x v^2

(1 point)
Responses

True
True

False

Answer 1

For the first question, the correct statement is:

The 12-pound shot A has the greater mass and the slower velocity because it is thrown 50 ft.

This statement highlights that while the 12-pound shot was thrown a greater distance than the 16-pound shot, it also has a greater mass. Generally, the increased distance can suggest a slower velocity for the heavier shot, though specific velocity measurements would confirm this.

For the second question, the correct response is:

True.

Kinetic energy indeed increases with both mass and velocity, as described by the formula KE = (1/2) x m x v^2. Both factors contribute to an increase in kinetic energy.