A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
Show Hint
- 100 J
- 150 J
- 200 J
- 250 J
The Correct Option is D
Solution and Explanation
To find the kinetic energy of a body, we use the formula:
Kinetic Energy (KE) = 0.5 × mass × velocity2
Given:
- Mass (m) = 5 kg
- Velocity (v) = 10 m/s
Plug these values into the kinetic energy formula:
KE = 0.5 × 5 kg × (10 m/s)2
First, calculate the square of the velocity:
(10 m/s)2 = 100 m2/s2
Then, substitute back into the formula:
KE = 0.5 × 5 kg × 100 m2/s2 = 250 kg·m2/s2
The kinetic energy is 250 J (joules).
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