Question

***WILL GIVE MEDAL***
which would best reduce the amount of energy needed to pull a wagon up a ramp?

1. Increasing the slope of the ramp
2. reducing the friction between the wagon wheels
3. reducing the length of the wagon handle
4. increasing the friction between the wagon wheels

Answer 1

I'm pretty sure it's one

Answer 2

it should be 4

Answer 3

But how does friction have to do with the energy of pulling a wagon up a ramp?

Answer 4

It matters on the slope, if it is at a big angle then it would be harder because you have to go like straight up and it uses a lot of energy, however if it were at less of an angle its much easier and does not require a lot of energy.

Answer 5

No it is 2. Definitely 2. increasing slope of ramp will only gradually equal wagons mass times gravitational force. if slope is lower, the ramp supports the wagon's mass.increasing the friction between wagon wheels will only make it harder!!!!!!!!!

Answer 6

nvm its is 1 sorry

Answer 7

i think it's one bcoz the machine would be more efficient if the slope's length is increased rather than reducing the friction between the wagon wheels:: now award me a medal as you have promised in your question :p

Answer 8

it is 2