What is the kinetic energy (in J) of a body moving at ?
Answer and explanation
Correct answer: C. 8
**
- Step 1: The translational kinetic energy of a body of mass moving with speed is given by .
- Step 2: Substitute and : .
- Step 3: Evaluate the expression: .
Answer
8.
Why not the others: '32' multiplies by instead of dividing by , calculating ; '16' omits the factor of , calculating ; '4' forgets to square the velocity, calculating .
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