In the friction experiment, what is the least mass you have to attach to the weight hanger for it to start moving after giving it a slight push. Given: mass of friction block = 1,300 gram Mass of weight hanger = 50 gram %3! coefficient of static friction = 0.25 %3D coefficient of kinetic friction 0.20 %3D 160 g 225 g 275 g 210 g

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In the friction experiment, what is the least mass you have to attach to the weight
hanger for it to start moving after giving it a slight push.
Given: mass of friction block = 1,300 gram
%3D
Mass of weight hanger = 50 gram
%3D
coefficient of static friction 0.25
coefficient of kinetic friction = 0.20
160 g
O 225 g
275 g
210 g
Transcribed Image Text:In the friction experiment, what is the least mass you have to attach to the weight hanger for it to start moving after giving it a slight push. Given: mass of friction block = 1,300 gram %3D Mass of weight hanger = 50 gram %3D coefficient of static friction 0.25 coefficient of kinetic friction = 0.20 160 g O 225 g 275 g 210 g
Why should the block move at constant velocity (due to the pull of the hanging
weight) when finding kinetic friction (procedure 2).
Because acceleration will add another force pulling the block (in addition to the tension
in the string)
Because we cannot measure acceleration.
Constant velocity means zero acceleration, means Tension = Friction force
If velocity is not constant, the tension in the string will become zero.
Transcribed Image Text:Why should the block move at constant velocity (due to the pull of the hanging weight) when finding kinetic friction (procedure 2). Because acceleration will add another force pulling the block (in addition to the tension in the string) Because we cannot measure acceleration. Constant velocity means zero acceleration, means Tension = Friction force If velocity is not constant, the tension in the string will become zero.
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