MECHANICAL SYSTEMS Torque & Levers (P )

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Presentation transcript:

MECHANICAL SYSTEMS Torque & Levers (P .81-86) SPH4C COLLEGE PHYSICS MECHANICAL SYSTEMS Torque & Levers (P .81-86)

Torque & Levers

Torque & Levers

Torque & Levers

Torque & Levers

Torque & Levers

Torque & Levers PRACTICE 1. A mechanic applies a force of magnitude 540 N perpendicular to a wrench to loosen a nut. Calculate the magnitude of the torque if the distance from the applied force to the nut is: (a) 0.30m T=162 Nm (b) 0.50m T=270 Nm

Torque & Levers PRACTICE 2. A person applies a force of magnitude 150 N at the hinge side of a door, which means that “d” is zero. What is the magnitude of the torque produced on the door? T=0 (since d=0)

Torque & Levers PRACTICE 3. A cyclist is signalling with one hand and turning the handlebar to turn a corner with the other. The cyclist applies a force of magnitude 4.5 N at 90° to the handlebar, which produces a torque of magnitude 0.99 N⋅m on the handlebar. Calculate the distance from the fulcrum to the applied force. d = 0.22 m

Torque & Levers PRACTICE 4. A corral gate is partly open. A cow hits the gate with her head at a distance of 3.6 m from the hinges. If the torque produced by the cow has a magnitude of 540 N⋅m, what force did the cow apply to the gate? (Assume that the force is perpendicular to the gate.) F = 150 N

Torque & Levers 5. If a wrench is unable to loosen a wheel nut, how can you use a hollow pipe to increase the torque provided by the wrench? put the pipe on the end of the wrench (increases d which increases T)

Torque & Levers TEXTBOOK P .83 Q.3-7