Question

A particle of mass 2 kg moves at 3 m/s. Its kinetic energy is:

• A. 9 J
• B. 18 J
• C. 12 J
• D. 6 J

Answer 1

The Correct Option is A

To solve the problem, we need to calculate the kinetic energy of a particle given its mass and velocity.

1. Understanding Kinetic Energy:

- Kinetic energy (KE) is the energy possessed by a body due to its motion.
- The formula to calculate kinetic energy is: \[ KE = \frac{1}{2} m v^2 \] where:
\( m \) = mass of the particle (in kg)
\( v \) = velocity of the particle (in m/s)

2. Given Values:

- Mass, \( m = 2 \, \text{kg} \)
- Velocity, \( v = 3 \, \text{m/s} \)

3. Calculate Kinetic Energy:

\[ KE = \frac{1}{2} \times 2 \times (3)^2 = 1 \times 9 = 9 \, \text{Joules} \]

Final Answer:

The kinetic energy of the particle is 9 Joules.