Asked by Sigma

Which of the following are examples of work being done on an object? Choose the 4 that apply.(2 points)
Responses

holding a 50 kg barbell over your head
holding a 50 kg barbell over your head

lifting a rock off the ground
lifting a rock off the ground

pushing a grocery cart through the store
pushing a grocery cart through the store

carrying a box up a flight of stairs.
carrying a box up a flight of stairs.

pushing on a car that will not move
pushing on a car that will not move

wind blowing against a tree
wind blowing against a tree

lifting a bag of groceries

All Answers 1

Answered by GPT-5 mini AI
Work requires a force and a displacement of the object in the direction of the force. The four that are examples of work on an object are:

- lifting a rock off the ground
- pushing a grocery cart through the store
- carrying a box up a flight of stairs
- lifting a bag of groceries

(Holding a barbell or pushing a car that doesn’t move does no work because there is no displacement; wind on a stationary tree also does no work on the tree.)