PRACTICE IT Use the worked example above to help you solve this problem. Two disgruntled businessmen are trying to use a revolving door, as shown in the figure. The door has a diameter of 2.60 m. The businessman on the left exerts a force of 647 N perpendicular to the door and 1.1 m from the hub's center, while the one on the right exerts a force of 806 N perpendicular to the door and 0.528 m from the hub's center. Find the net torque on the revolving door. (Indicate the direction with the sign of your answer.) N.m EXERCISE HINTS: GETTING STARTED I'M STUCK! A businessman enters the same revolving door on the right, pushing with 528 N of force directed perpendicular to the door and 0.621 m from the hub, while a boy exerts 388 N perpendicular to the door, 1.35 m to the left of the hub. (Indicate the direction with the sign of your answer.) (a) Find the torques exerted by each person. boy= N.m Tman N.m (b) Find the net torque on the door. net = N.m

PRACTICE IT Use the worked example above to help you solve this problem. Two disgruntled businessmen are trying to use a revolving door, as shown in the figure. The door has a diameter of 2.60 m. The businessman on the left exerts a force of 647 N perpendicular to the door and 1.1 m from the hub's center, while the one on the right exerts a force of 806 N perpendicular to the door and 0.528 m from the hub's center. Find the net torque on the revolving door. (Indicate the direction with the sign of your answer.) N.m EXERCISE HINTS: GETTING STARTED I'M STUCK! A businessman enters the same revolving door on the right, pushing with 528 N of force directed perpendicular to the door and 0.621 m from the hub, while a boy exerts 388 N perpendicular to the door, 1.35 m to the left of the hub. (Indicate the direction with the sign of your answer.) (a) Find the torques exerted by each person. boy= N.m Tman N.m (b) Find the net torque on the door. net = N.m

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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TEXT ANSWER In order to make a video for physics class, Sergei used concrete blocks to create static equilibrium to balance himself on a board. Sergei planned to sit 2.0 m from the pivot point and place the blocks 4.0 m from the pivot point on the opposite side. Sergei's mass was 100.0 kg. If each concrete block had a mass of 10 kg, how many blocks did Sergei need to place the system in static equilibrium? Show your work.
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PRACTICE IT Use the worked example above to help you solve this problem. Consider the figure below, where m, = 5.58 kg, m, = 2.32 kg, m2 = 4.43 kg, d, = 0.487 m, and d, = 1.68 m. Treat the objects as point particles. 1.00 m m2 m3 m2 dz d, -0.500 m m3 (a) Three particles are located in a coordinate system shown in Figure (a). Find the center of gravity. m (b) How does the answer change if the object on the left is displaced upward by 1.00 m and the object on the right is displaced downward by 0.500 m (Figure (b))? m *cg Y cg EXERCISE HINTS: GETTING STARTED | I'M STUCK! Use the values from PRACTICE IT to help you work this exercise. If a fourth particle of mass 1.45 kg is placed at (0 m, 0.210 m) in Figure (a), find the x- and y-coordinates of the center of gravity for this system of four particles. X cg m У сд
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