Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
Which part of the arm acts as the pivot point for the arm lever?
fingers
wrist
elbow
shoulder
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What is the 'rotational effect' called when a force acts on a lever?
acceleration
moment
torque
impulse
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For the arm to remain stationary, the muscle's moment must be:
less than the weight's moment
greater than the weight's moment
equal to the weight's moment and in the opposite direction
equal to the weight's moment and in the same direction
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The moment formula is: Moment = × perpendicular distance.
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What is the unit used for the size of a moment?
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A student is holding a 10 N textbook 0.4 m from their elbow.
Calculate the moment generated by the textbook on the student's arm lever.
2 Nm
4 Nm
8 Nm
6 Nm
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A muscle generates a moment of 2.5 N m to hold a weight and the muscle's distance to the elbow pivot is 0.05 m.
Calculate the muscle force required.
100 N
25 N
75 N
50 N
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To balance a moment of 5 N m caused by a weight, a muscle's force acts 0.04 m from the elbow.
Calculate the force exerted by the muscle.
200 N
150 N
125 N
100 N
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A student holds a 5 N weight at a distance of 0.2 m from their elbow.
Calculate the moment generated by this weight on the arm lever.
N m
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A muscle applies a force to balance a moment of 4 N m. The distance from the muscle to the elbow pivot is 0.04 m.
Calculate the force exerted by the muscle.
N
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