Question

A 1.0-kg ball is thrown into the air with an initial velocity of 3 m/s. How much kinetic energy does the ball have?

A. 4.5 J
B. 9.0 J
C. 13.5 J
D. 18.0 J

Answer 1

The 1.0-kg ball has a kinetic energy of 4.5 J with an initial velocity of 3 m/s.

Step-by-step explanation:

The kinetic energy of an object can be calculated using the formula:

KE = 1/2 * mass * velocity^2

In this question, the 1.0-kg ball has an initial velocity of 3 m/s. Plugging these values into the formula, we get:

KE = 1/2 * 1.0 kg * (3 m/s)^2 = 4.5 J

Therefore, the ball has a kinetic energy of 4.5 J.