B C D From t = 0s tot = 1 s From t = 1 stot = 3 s From t = 3 s tot = 5 s Fmotor (N) 10+ From t = 5 s tot = 7 s 88642 ON TO 0 -2 -4- -6 -8 -10 A motor drives a shaft of radius R/8 that is attached to the center of a wheel of radius R. The motor is turned off, and the force that the motor exerts on the shaft, Fmotor, varies with time, as shown. There is also a constant friction force of 0.4 N applied to the rim of the wheel in the opposite direction of the motion. During which time interval does the rotational kinetic energy increase and then decrease? 2 4 +6 00+ 8 10 -t (s)

B C D From t = 0s tot = 1 s From t = 1 stot = 3 s From t = 3 s tot = 5 s Fmotor (N) 10+ From t = 5 s tot = 7 s 88642 ON TO 0 -2 -4- -6 -8 -10 A motor drives a shaft of radius R/8 that is attached to the center of a wheel of radius R. The motor is turned off, and the force that the motor exerts on the shaft, Fmotor, varies with time, as shown. There is also a constant friction force of 0.4 N applied to the rim of the wheel in the opposite direction of the motion. During which time interval does the rotational kinetic energy increase and then decrease? 2 4 +6 00+ 8 10 -t (s)

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)...

See similar textbooks

Similar questions

An electric motor rotating a wheel at 36 rad/s (radians per second) is turned off. If the wheel comes to rest after 12seconds, find the angle through which the wheel turns before coming to rest. A.) theta = 815 radians B.) theta = 216 radians C.) theta = 624 radians D.) theta = 936 radians
Mass=1/12M
Starting from rest when s=0, pulley A is given a constant angular acceleration ac is 6 rad/s 2. Determine the speed of block B when it has risen s=6 m. The pulley has an inner hub D which is fixed to C and turns with it.
MY NOTE A uniform solid ball rolls smoothly along a floor, then up a ramp inclined at 16.0°. It momentarily stops when it has rolled 1.90 m along the ramp. What was its initlal speed? m/s Submit Answer 16 Rointsl DETAILS HRW10 11 R. 020 MY NOTE
A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. The string rotates at an angular speed of 46 rev/s, and its tip has a tangential speed of 60 m/s. What is the length of the rotating string? Number Type your answer here Units Choose your answer here
A bicycle racer is going downhill at 14.0 m/s when to his horror, one of his 2.07 kg wheels comes off when he is 73.0 m above the foot of the hill We can model the wheel as a thin-walled cylinder 850 cm in diameter and neglect the small mass of the spokes Part A How fast is the wheel moving when it reaches the foot of the hill if it roled without slipping all the way down? Submit Part B VAL Request Answer A + How much total kinetic energy does the wheel have when it reaches the bottom of the hill? K-1101290.25 Submit Previous Answers Request Answer ? X Incorrect; Try Again m/s 3
A small windmill has its center 6m above the ground and 2m in length. In a steady wind, a point a at the tip of one blade makes a complete rotation in 12s. a) if the rotation begins at the highest possible point, draw a sketch showing 2 cycles. Clearly label the sketch b)what is a function (an equation) that gives the height of that point P above the ground at time t? c) what is the height at point P at 5s? d) at what time during the first cycle is point P excalty 7m above the ground?
IS Area ent Sharing ettings Tools Problem 2 A 3-kg uniform slender rod AC can rotate in a vertical plane about pin B. A spring of constant k = 400-N/m and of unstretched length of 0.1 m is attached to the rod at end C as shown. (Figure 1) Figure 1 of 1 Initial position A 0.7 m Go B 0.15 m G C B 0.15 m 0.4 m C 0.4 m D D Final position 2 of 6 ▼ Part A If the rod is released from rest from the initial position shown, determine the magnitude of its angular velocity after it has rotated through 90° to reach the final position shown. Express your answer using three significant figures. [35] ΑΣΦ | 41 vec = W= rad/s Submit Request Answer Provide Feedback > Next >
A 1.2kg bike wheel, is spinning 210rpm clockwise when a student applies a frictional force as shown. The moment of inertia of any ring (such as the bike tire, 10cm neglecting the spokes) is I = mr2. Answer all questions realtive to the center of the wheel. What is the initial angular speed (in selectable units)? rad/s How much torque does the friction cause? unit What is the moment of inertia? unit What is the angular acceleration? unit How long will the wheel take to stop spinning? unit : How far will the wheel rotate before stopping? 2.65N rad revolutions
A ring of radius R is released from rest to roll down a rough incline (assuming there's no energy loss due to friction and there's no slipping in the rolling). Calculate its speed when it reaches the foot of the incline, 4R below the starting point. 4R R (KE+KE,+PE), = = (KE+KE,+PE)f 1 2 0+0+mg4R = ¹1 mv³² + ¹² (mR²³)w² +0 2 2 R
The 34-N force P is applied perpendicular to the portion BC of the bent bar. Determine the moment of P about point B and about point A. Moments are positive if counterclockwise, negative if clockwise. P = 34 N 1.4 m B Answers: MB = i MA = i A 43° 1.4 m N.m N.m
All answers were incorrect and the solutions are confusing me. Please help! Also the 4th part of the question was not answered/explained