Physics test review problem
You've got a flat tire. To lift your car, you make a homemade lever. A very light 1.6--long handle part is pushed down on the right side of the fulcrum and a 0.050-m
long part on the left side supports the back of the car.
How hard must you push down on the handle so that the lever exerts an 9700- force to lift the back of the car?
Homework Answers
Considering equilibrium of moment
Fd = fr
F = 9700 * 0.05/1.6
F = 303.125 N
SOLUTION :
Let force to be applied on the handle be F (Newtons).
Moment about fulcrum :
9700 * 0.05 = F * 1.6
=> F = 9700 * 0.05 / 1.6
=> F = 303.125 N (ANSWER).
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