Quickly must get it done for homework or into detention i go

how much is accomplished when two boys push a car a distance of 45 m with a force of 900 n? (give answer in joules)

a 53 kg student runs up a flight of stairs 5.5m high how much work (in joules) is done (you must first determine the weight of the student in newtons w=mxg)

a man applies a force of 60n in attempt to vove a desk 20m in spite of his effort, the desk refuses to budge how much work is accomplished

answer:

thtnnttn

explanation:

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//