PHYSICS 1L03 Lecture Notes - Isometric Exercise, Triceps Brachii Muscle, Spark Plug

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scarletturtle753

25 Jan 2014

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Eight series: questions on torque and equilibrium: trap door, of length and width 1. 65 m, is held open at an angle of 65. 0o with respect to the floor. A rope is attached to the raised edge of the door and fastened to the wall behind the door in such a position that the rope pulls perpendicularly to the trap door. If the mass of the trap the trap door is 16. 8 kg, what is the torque exerted on the trap door by the rope: a rod is being used as a lever as shown. The fulcrum is 1. 2 m from the load and 2. 4 m from the applied force. If the mass of the load is 20. 0 kg, what force must be applied to lift the load: a weight of 1200 n rests on a lever at a point 0. 50 m from a support.

Related Questions

5) [8 pts] An automatic screen door closing mechanism works by applying a force of 25.0 N at a distance of 50 cm from the hinge of the door, and at an angle to the door of 20- (see figure). The moment of inertia of the door is given by I = 1/3 MW?, where M is the door's mass and W is the width of the door. Take W = 80.0 cm and M = 10.0 kg. For the door in the position shown in the figure: a) Calculate the torque applied by the door closing mechanism on the door; b) Calculate the angular acceleration of the door. door W=0.80 m F:25 N 50 cm -door closing mechanism hinge

In the illustration below, one 40 kg monkey hangs from one endof a 100 kg uniform rod that is 12 m long, another 60 kg monkeystands above the pivot (center of rotation), and a 20 kg turkeylies 1 m from the opposite end. Also, the standing monkey pulls ona rope as shown with a force of 200 N.

Find the torque exerted by the standing monkey's weight, Whichtorque is missing? Find it., what is the net torque exerted on therod?

Answer: 0, 3000 Nm, 2900 Nm

*Pertaining to finding the torque that missing, my professor hadalready asked us to find the torque exerted by the standingmonkey's weight, the torque exerted by the tension in the rope(pulled by the standing monkey) and the torque exerted by theturkey....I don't know which torque is missing and how to solve forit

a) What is the mechanical advantage of a wheelbarrow, such as the one in Figure 9.24, if the center of gravity of the wheelbarrow and its load has a perpendicular lever arm of 5.50 cm, while the hands have a perpendicular lever arm of 1.02 m? (b) What upward force should you exert to support the wheelbarrow and its load if their combined mass is 55.0 kg? (c) What force does the wheel exert on the ground?

Figure 9.24 (a) In the case of the wheelbarrow, the output force or load is between the pivot and the input force. The pivot IS the wheel's axle. Here, the output force is greater than the input force. Thus, a wheelbarrow enables you to lift much heavier loads than you could with your body alone. (b) In the case of the shovel, the input force is between the pivot and the load, but the input lever arm is shorter than the output lever arm. The pivot is at the handle held by the right hand. Here, the output force (supporting the shovel's load) is less than the input force (from the hand nearest the load), because the Input is exerted closer to the pivot than is the output

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PHYSICS 1L03 Lecture Notes - Isometric Exercise, Triceps Brachii Muscle, Spark Plug

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