Question:medium
What is the kinetic energy of a body of mass $ 2 \, \text{kg} $ moving with a velocity of $ 5 \, \text{m/s} $?
What is the kinetic energy of a body of mass $ 2 \, \text{kg} $ moving with a velocity of $ 5 \, \text{m/s} $?
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Remember: Kinetic energy is always positive and is given by \( KE = \frac{1}{2} m v^2 \).
Updated On: Feb 19, 2026
- \( 25 \, \text{J} \)
- \( 10 \, \text{J} \)
- \( 50 \, \text{J} \)
- \( 5 \, \text{J} \)
Show Solution
The Correct Option is A
Solution and Explanation
Determine the Body's Kinetic Energy
Input data:
- Body's mass \( m = 2 \, \text{kg} \)
- Body's velocity \( v = 5 \, \text{m/s} \)
Step 1: Formula for Kinetic Energy
Kinetic energy is calculated using: \[ KE = \frac{1}{2} m v^2 \]
Step 2: Value Substitution
Substitute the provided values: \[ KE = \frac{1}{2} \times 2 \, \text{kg} \times (5 \, \text{m/s})^2 \]
Step 3: Calculation Simplification
\[ KE = \frac{1}{2} \times 2 \times 25 = 25 \, \text{J} \]
Result:
The calculated kinetic energy is \( 25 \, \text{J} \).
Correct Option:
Option 1: 25 J
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