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