Multiple choice

If the speed of a car is doubled, its kinetic energy increases by _____ times.

  1. sixteen

  2. eight

  3. four

  4. two
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kinetic energy is directly proportional to the square of velocity (KE = 1/2 mv²). When speed doubles (v → 2v), KE increases by factor of 2² = 4.

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