Multiple choice general knowledge science & technology

A carton is pulled along the ground for a distance of 8 m. If the average frictional force is 67 N, then the work done is

  1. 333 J

  2. 8 J

  3. 536 J

  4. 67 J
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Work done against friction is W = F × d = 67 N × 8 m = 536 J. The applied force must at least equal friction to maintain motion. This work becomes thermal energy dissipated as heat.

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