What is the kinetic energy (in J) of a body moving at ?

Answer and explanation

Correct answer: A. 32

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  1. Step 1: Kinetic energy is defined as .
  2. Step 2: Setting and , write .
  3. Step 3: The calculated energy is .
Answer
32.
Why not the others: '128' multiplies by instead of dividing by , calculating ; '64' omits the factor of , calculating ; '16' computes linear momentum rather than kinetic energy.

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