5.Two kids are playing on a teeter totter. The teeter totter is 6.00 mlong, assume the pivot point is right in the middle. The kid on the leftsits 0.40 m from the left end. The kid on the right sits 0.60 m from theright end. At a particular instant in time, the kid on the left exertspushes down on the teeter totter with a 400 N force perpendicular tothe teeter totter.a. What is the torque that the kid on the left exerts on the teeter totter? Provide bothmagnitude AND direction.5308)b. At the same time, the kid on the right pushes down with a force of 350 N perpendicularto the teeter totter. What is the torque that the kid on the right exerts on the teetertotter? Provide both magnitude AND direction.C.etaubongL/6yo no terdsla†What is the total torque on the teeter totter about the pivot in the middle at thisinstant? Provide both magnitude AND direction.6. Find the moment of inertia of the uniform rod below of mass M about the axis shown below. You caneither use the parallel axis theorem or integration. The moment of inertia for a rod rotating about itscenter of mass is (1/12) ML². Clearly show your work.-5L/6-H

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Answered: 5. Two kids are playing on a teeter…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And Gravitation

Section: Chapter Questions

Problem 56AP: Keratinocytes are the most common cells in the skins outer layer. As these approximately circular...

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Michael Jordan has a portable basketball hoop in his driveway. He has set the basket at 8 ft (2.4 m) high so he can practice dunking the ball (he’s a bit older now, so he can’t quite jump “Air” Jordan style). He slams the ball through the hoop and then hangs on to the rim. This exerts a downward force of 600 N on the front of the rim. The front of the rim is 1.1 m in front of the front edge of the portable hoop’s base. The mass of the whole portable basketball hoop is 70 kg. The center of gravity of the portable hoop is 1.0 m behind the front edge of the base. How much torque is produced around the front of the hoop base by the 600 N force Air Jordan exerts on the front of the rim? How much torque is needed to tip the hoop? What is the largest vertical force that can be exerted on the front edge of the rim before the portable hoop begins to tip?
Four forces F1,F2,F3 and F4 are being applied on a plate as shown in Figure 1. F1 = 1.2 kN, F2 = 2.3 kN, F3=2.3kN and F4 = 4.5 kN. Find the moment at ? due to F4 using scalar formulation. Then, using vector formulation find the resultant moment at point P.
I've been having trouble with physics problems involving forces and friction. I can understand the basic formulas (such as F=ma), but it gets too hard for me to understand once friction is introduced, and angles as well. I would love for a good explanation to help me, maybe using the attached problems as a starting point.
A 16.0-kg child swings in a swing supported by a chain, 5.06 m long. The tension in thechain at the lowest point is 200 N.a. Find the child’s speed at the lowest point.b. Find the force exerted by the seat on the child when the chain makes a 30◦ anglewith the vertical. (Ignore the mass of the seat, and the small angular acceleration atthis point.)Answer Box:a = 3.69 m/sb = <0.5, 157.8> N
stops in 1.5 s. What is the magnitude of the friction force on the disk? 49. A 200 g, 20-cm-diameter plastic disk is spun on an axle through its center by an electric motor. What torque must the motor supply to take the disk from 0 to 1800 rpm in 4.0 s?
To get up on the roof, a person (mass 70.0 kg) places 6.00-m aluminum ladder (mass 10.0 kg) against the house on a concrete pad with the base of ladder 2.00 m from the house. The ladder rests against a plastic rain gutter, which we can assume to frictionless. The center of ladder is 2.00 m from the bottom. The person is standing 3.00 m from the bottom. Find the normal reaction and friction forces on the ladder at its base.
A diver off the high board imparts an initial rotation with his body fully extended before going into a tuck and executing three back somersaults before hitting the water. If his moment of inertia before the tuck is 16.9kgm2 and after the tuck during the somersaults is 4.2kgm2 , what rotation rate must he impart to his body directly off the board and before the tuck if he takes 1.4 s to execute the somersaults before hitting the water?
A gymnast does cartwheels along the floor and then launches herself into the air and executes several flips in a tuck while she is airborne. If her moment of inertia when executing the cartwheels is 13.5kgm2 and her spin rate is 0.5 rev/s, how many revolutions does she do in the air if her moment of inertia in the tuck is 3.4kgm2 and she has 2.0 s to do the flips in the air?
Keratinocytes are the most common cells in the skins outer layer. As these approximately circular cells migrate across a wound during the healing process, they roll in a way that reduces the frictional forces impeding their motion. (a) Given a cell body diameter of 1.00 105 m (10 m), what minimum angular speed would be required to produce the observed linear speed of 1.67 107 m/s (10 m/min)? (b) How many complete revolutions would be required for the cell to roll a distance of 5.00 103 m? (Because of slipping as the cells roll, averages of observed angular speeds and the number of complete revolutions are about three times these minimum values.)
The block on a smooth inclined plane is moving down with a constant acceleration of 4 m/s². m. m o W The block on the inclined plane is 35 kg and the hanging mass is 24 kg. The radius of the pulley is 0.33 m. The angle theta is 56 degress. Determine the moment of inertia of the pulley. ROUND OFF FINAL ASWER UP TO 2 DECIMAL PLACES. INPUT THE NUMBER ONLY.
F2 30.0 O K 2.00 m 3.00m->l Find the net (or total) torque about point O for the two forces as in the figure above. let F₁ = 7.80N and F₂=15. ON Express your answer in newton-meters. VF1
A tightrope walker is walking between two buildings holding a pole with length L = 14.0 m, and mass m, = 18.5 kg. The daredevil grips the pole with each hand a distance d = 0.575 m from the center of the pole. A bird of mass m, = 545 g lands on the very end of the left-hand side of the pole. 2d Assuming the daredevil applies upward forces with the left and right hands in a direction perpendicular to the pole, what magnitude of force Fieft and Fright must the left and right hand exert to counteract the torque of the bird? Fieft = N Fright N

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