Question

A body of mass 2 kg is moving with a velocity of 3 m/s. What is its kinetic energy?

• A. 6 J
• B. 9 J
• C. 12 J
• D. 18 J

Hint:

Remember: Kinetic energy is calculated using the formula \( KE = \frac{1}{2} m v^2 \).

Answer 1

The Correct Option is B

Given: \[ m = 2 \, \text{kg}, \quad v = 3 \, \text{m/s} \] Step 1: Formula for Kinetic Energy The kinetic energy \( KE \) is given by the formula: \[ KE = \frac{1}{2} m v^2 \] Step 2: Substitute the values Substitute the given values into the formula: \[ KE = \frac{1}{2} (2) (3)^2 = 9 \, \text{J} \] Answer: The correct answer is option (2): 9 J.