Question

Equilibrium Wheelbarrow

Answer 1

suppose that you can lift no more than 650N unaided. How much can you lift using a 1.4m long wheelbarrow that weighs 80N with its CG .5m from the center of the wheel. The CG of the load in the wheelbarrow is also .5m from the wheel? Additionally where does the force come from that enables you to lift more than 650N using the wheelbarrow?

Answer 2

FBD

Answer 3

FBD correction

Answer 4

I took the center of the wheel as the pivot so my toque equations I had setup as \[W2(0.5)=(-80)(0.5)+(650)(1.4)\]

Answer 5

I got W=1740N, but I am not sure if this is right, and I dont understand where the additional force for lifintg is coming from. Does it mean the normal force of the barrow is helping lift the load?

Answer 6

@cwrw238

Answer 7

@Coolsector ,@TheSmartOne

Answer 8

@TheSmartOne

Answer 9

Physics is fine but you made a math error recalculate W2.

Answer 10

I'm still getting 1740. Is it that it should be +80?

Answer 11

hang on a sec...be right back.

Answer 12

W = (650*1.4 - 80*.5)/(0.5) = ...see what you get

Answer 13

1740

Answer 14

650*1.4=910 80*.5=40 910-40=870 870/.5=870*2=1740

Answer 15

Sorry, my bad...that is correct...I have been looking at to many problems today!

Answer 16

it's ok thanks for your help. Is the response for the extra lifting force being from the normal force of the barrow acceptable too?

Answer 17

yes

Answer 18

alright. thank you

Answer 19

welcome ....sorry for the error.