How do you think the force of friction is related te the ef frieter experiment?

Question

How do you think the force of friction is related te the ef frieter experiment? a) Propertienel, b) preportierel, c) Mat related inversely 2. In panhing heavy bex acress the floor, is the force that you need to te rtert the be e)reater than, b) less than, er 4the sere the feree needed te keep the bee nevrs? b) when an object moving one eurface, if yeu increase the nare, coefficient ef fricten decreeee. increase, c) renain the sane. 4. If you graph net force w, acceleration (F w..) hat anve do You..reet? e)eregt b) upse, c) parabola

Explanation / Answer

(1)

We know that,

Force of friction Fr = umg

Fr is (a) proportional to weight of box.

(2)

Force needed to start the box moving , is (a) greater than the force needed to keep the box moving.

(3)

coefficient of friction does not depend on mass of object.

so, it remains the same (c).

(4)

When plot Force vs acceleration graph.

curve is (a) straight line.

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