Which of the following are examples of work being done on an object? Choose all 4 that apply.
a. lifting a rock off the ground
b. carrying a box up a flight of stairs
c. pushing on a car that will not move
d. lifting a bag of groceries
e. wind blowing against a tree
f. carrying a bag of groceries through the store.
g. holding a 45 kg barbell over your head
h. pushing a grocery cart through the store
a. lifting a rock off the ground
b. carrying a box up a flight of stairs
c. pushing on a car that will not move
d. lifting a bag of groceries