In which of the following situations has work been done? Select one: a. A weightlifter holds a 50kg barbell over his head for 3 minutes. b. A yoga instructor holds a handstand for 1 minute. c. A man pulls against a stationary fire truck for 5 minutes. d. A child pushes a 2kg toy 10m across the floor.

Question

Colten Shields

Physics

25 April, 08:02

In which of the following situations has work been done? Select one: a. A weightlifter holds a 50kg barbell over his head for 3 minutes. b. A yoga instructor holds a handstand for 1 minute. c. A man pulls against a stationary fire truck for 5 minutes. d. A child pushes a 2kg toy 10m across the floor.

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Cowboy · Answer 1

Work done = Force * distance - - - In other words, for work to be done, a force should be applied such that there is motion.

Therefore, the only situation meeting the criteria is situation d. where a force is applied resulting to motion.