In each of the diagrams below, O refers to the pivot point and P is the point of

ID: 1465464 • Letter: I

Question

In each of the diagrams below, O refers to the pivot point and P is the point of application of the force. In all cases the magnitude of the force is the same and the distance between O and P are equal.

(a) In which one of the diagrams does the line of action of the force pass through the pivot point? (Select all that apply.)

(b) In which of the cases is the lever arm and therefore the torque zero? (Select all that apply.)

diagram (i)diagram (ii)diagram (iii)diagram (iv)diagram (v)

(c) In which of the cases is the lever arm and therefore the torque the maximum? (Select all that apply.)diagram (i)diagram (ii)diagram (iii)diagram (iv)diagram (v)

Please Help Explain how I find the answers! Thank You

(i) (ii) (iii) (iv) (v)

Explanation / Answer

a) in case ii,iv as if we extend the tail of force in back direction it passes point O in this case only

b) in case ii,iv as if we extend the tail of force in back direction it passes point O in this case only

and torque = Force*perpendicular distance from force

perpendicular distance from force is zero => torque is zero

c) in case iii

torque = Force*perpendicular distance from force

perpendicular distance from force is max in this case => torque is max

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