Q3:al Four forces are shown in the figure below at particular locations and orientations with respect to a given xy-coordinate system. (1) Find the work due to each force on the origin. (2) Find the torque due to each force about the origin. 1² y (m) M33. - 3 2 1 2 3 1 53 30 N -40 20 N 60 -2.0 20 N 0 40 -20 -2.0- 20 40 N

Q3:al Four forces are shown in the figure below at particular locations and orientations with respect to a given xy-coordinate system. (1) Find the work due to each force on the origin. (2) Find the torque due to each force about the origin. 1² y (m) M33. - 3 2 1 2 3 1 53 30 N -40 20 N 60 -2.0 20 N 0 40 -20 -2.0- 20 40 N

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter11: Energy And Its Conservation

Section: Chapter Questions

Problem 65A

See similar textbooks

Similar questions

A light rod of length 2L is free to rotate in a vertical plane about a frictionless pivot through its center. A particle of mass m1 is attached at one end of the rod, and a mass m2 is at the opposite end, where m1 m2. The system is released from rest in the vertical position shown in Figure P8.84a, and at some later time, the system is rotating in the Position shown in Figure P8.84b. Take the reference point of the gravitational potential energy to be at the pivot, (a) Find an expression for the system's total mechanical energy in the vertical position. (b) Find an expression for the total mechanical energy in the rotated position shown in Figure P8.84b. (c) Using the fact that the mechanical energy of the system is conserved, how would you determine the angular speed co of the system in the rotated position? (d) Find the magnitude of the torque on the system in the vertical position and in the routed position. Is the torque constant? Explain what these results imply regarding the angular momentum of the system, (c) Find an expression for the magnitude of the angular acceleration of the system in the rotated position. Does your result make sense when the rod is horizontal? When it is vertical? Explain. Figure P8.84
Hi please help: A point mass of 1.2 kg at the end of a cord is rotated on a frictionless horizontal surface in a circle of radius 0.2 m with an angular velocity of 3.8 rad/s If the cord is shortened to 0.1 m, how much work (in Joules) is required to shorten the cord? Answer in 3 significant figures
For a home repair job you must turn the handle of a screwdriver27 times. (a) If you apply an average force of 13 N tangentially tothe 3.0-cm-diameter handle, how much work have you done?(b) If you complete the job in 24 seconds, what was your averagepower output?
DRAW A FREE BODY DIAGRAM! The Achilles’ tendon inserts on the calcaneus (the heel bone) at a distance of 8 cm from the axis of the ankle joint. If the force generated by the muscles attached to the Achilles’ tendon is 3000 N and the moment arm of this force about the ankle joint axis is 5 cm, what torque is created by these muscles about the ankle joint? (Show all work, and draw a free body diagram)
To develop muscle tone, a woman lifts a 2.00-kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0º . (a) What is the angular acceleration if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg ⋅ m2 , and the net force she exerts is 750 N at an effective perpendicular lever arm of 2.00 cm? (b) How much work does she do?
A solid spherical jewel rolls smoothly from rest down a ramp. The jewel descends a vertical height of 1.2m to reach the bottom of the ramp. What is the jewel's speed at the bottom of the ramp? Hint: This problem has nothing to do with elasticity as we did not formally cover that topic, and the inertia of a solid sphere is found by 2/5 m r2
To develop muscle tone, a woman lifts a 2.00-kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0. (a) What is the angular acceleration if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.0250 kg.m, and the net force she exerts is 750 N at an effective perpendicular lever arm of 2.00 cm? (b) Howmuch work does she do?
A merry-go-round on a playground consists of a horizontal solid disk with a weight of 795 N and a radius of 1.56 m. A child applies a force 49.0 N tangentially to the edge of the disk to start it from rest. What is the kinetic energy of the merry-go-round disk (in J) after 2.95 s? ________J
The Achilles’ tendon inserts on the calcaneus (the heel bone) at a distance of 8 cm from the axis of the ankle joint. If the force generated by the muscles attached to the Achilles’ tendon is 3000 N and the moment arm of this force about the ankle joint axis is 5 cm, what torque is created by these muscles about the ankle joint? (Show all work, and draw a free body diagram)
Releasing a frictionless box and a rolling disk with equal masses from the top of identical inclined planes, how much sooner does the box reach the bottom of the incline than the disk? Express your answer in terms of some or all of the variables m, h, θ, and R, as well as g. We know: The potential energy of the disk is converted into translational and rotational kinetic energy, so the translational speed grows more slowly than that of the box, which has no rotational energy.
A merry-go-round on a playground consists of a horizontal solid disk with a weight of 805 N and a radius of 1.53 m. A child applies a force 50.5 N tangentially to the edge of the disk to start it from rest. What is the kinetic energy of the merry-go-round disk (in J) after 2.95 s?
A 170-lb man carries a 20-lb can of paint up a helical staircase that encircles a silo with radius 15 ft. If the silo is 60 ft high and the man makes exactly two complete revolutions, how much work is done by the man against gravity in climbing to the top?