The tub of the mixer has a weight of 70 lb and a radius of gyration kg = 1.3 ft about its center of gravity. If a constant torque M = 60 lb · ft is applied to the tub, determine its angular velocity when it has rotated 0 = 45°. Originally the tub is at rest when 0 = 0°. 0.8 ft Hint: don’t forget about the work done by the weight. Partial Ans. 3.48 rad/s G M

The tub of the mixer has a weight of 70 lb and a radius of gyration kg = 1.3 ft about its center of gravity. If a constant torque M = 60 lb · ft is applied to the tub, determine its angular velocity when it has rotated 0 = 45°. Originally the tub is at rest when 0 = 0°. 0.8 ft Hint: don’t forget about the work done by the weight. Partial Ans. 3.48 rad/s G M

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter10: Rotational Motion And Angular Momentum

Section: Chapter Questions

Problem 30PE: To develop muscle tone, a woman lifts a 2.00-kg weight held in her hand. She uses her biceps muscle...

See similar textbooks

Similar questions

A screwdriver turns a screw an angle of 5.09 radians by applying a torque given by (in Nm) T=1.57 + 6 Calculate the work done, W by the torque. Enter W, measured in Joules, correct to three significant figures:
A metal can containing condensed mushroom soup has mass 215g,height 10.8cm, and a diameter of 6.38cm. It is placed at reston its side at the top of a 3.00m-long incline plane that is at25.0o to the horizontal and is then released to rollstraight down. It reaches the bottom of the incline after1.50s. Assuming mechanical energy conservation, calculate themoment of inertia of the can. Which pieces of data, if any,are unnecessary for calculating the solution.
(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) N 0.88 m m = 56 kg CG W 1.46 m W Freaction (b) How much work (in J) does she do if her center of mass rises 0.180 m? (c) What is her useful power output (in W) if she does 24 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.)
(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m = 65 kg CG N 0.85 m 1.41 m W reaction (b) How much work (in J) does she do if her center of mass rises 0.260 m? (c) What is her useful power output (in W) if she does 21 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.) W
(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m = 47 kg CG Fe reaction 0.85 m 1.42 m N (b) How much work (in J) does she do if her center of mass rises 0.220 m? (c) What is her useful power output (in W) if she does 24 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.)
(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m = 62 kg CG w Freaction 0.87 m 1.45 m N (b) How much work (in J) does she do if her center of mass rises 0.180 m? (c) What is her useful power output (in Ww) if she does 27 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.)
(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m = 65 kg CG Freaction 0.86 m 1.44 m (b) How much work (in J) does she do if her center of mass rises 0.260 m? (c) What is her useful power output (in W) if she does 21 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.) W
(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m = 68 kg CG Fre reaction 0.85 m 1.41 m N (b) How much work (in J) does she do if her center of mass rises 0.220 m? (c) What is her useful power output (in W) if she does 15 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.) W
A horizontal 800-N merry-go-round is a solid disk of radius 1.50 m and is started from rest by aconstant horizontal force of 50.0 N applied tangentially to the edge of the disk. Find the kinetic energyof the disk after 3.00 s.
A horizontal 790-N merry-go-round of radius 1.40 m is started from rest by a constant horizontal force of 45 N applied tangentially to the merry-go-round. Find the kinetic energy of the merry-go-round after 2.0 s. (Assume it is a solid cylinder.) J
A horizontal 800.-N merry-go-round of radius 1.50 m is startedfrom rest by a constant horizontal force of 50.0 N applied tangentially to the merry-go-round. Find the kinetic energy of the merry-go-round after 3.00 s. (Assume it is a solid cylinder.)
(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m = 53 kg CG w Freaction 0.87 m 1.45 m (b) How much work (in J) does she do if her center of mass rises 0.220 m? (c) What is her useful power output (in W) if she does 27 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.) W