Part A An automobile engine slows down from 4000 rpm to 1400 rpm in 2.0 s. Calculate its angular acceleration, assumed constant. Express your answer using two significant figures. a= -140 rad/s? Submit Previous Answers v Correct Correct answer is shown. Your answer -136.13 rad/s was either rounded differently or used a different number of significant figures than required for this part. Part B Calculate the total number of revolutions the engine makes in this time. Express your answer as an integer. N = 86.6 revolutions

Part A An automobile engine slows down from 4000 rpm to 1400 rpm in 2.0 s. Calculate its angular acceleration, assumed constant. Express your answer using two significant figures. a= -140 rad/s? Submit Previous Answers v Correct Correct answer is shown. Your answer -136.13 rad/s was either rounded differently or used a different number of significant figures than required for this part. Part B Calculate the total number of revolutions the engine makes in this time. Express your answer as an integer. N = 86.6 revolutions

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

While riding a multispeed bicycle, the rider can select the radius of the rear sprocket that is fixed to the rear axle. The front sprocket of a bicycle has radius 12.5 cm. Part A If the angular speed of the front sprocket is 0.500 rev/s, what is the radius of the rear sprocket for which the tangential speed of a point on the rim of the rear wheel will be 4.00 m/s? The rear wheel has radius 0.320 m. Express your answer in meters. ? m Submit Request Answer
A 1.15-kg grinding wheel 22.0 cm in diameter is spinning counterclockwise at a rate of 20.0 revolutions per second. When the power to the grinder is turned off, the grinding wheel slows with constant angular acceleration and takes 80.0 s to come to a rest Part A What was the angular acceleration (in rad/s) of the grinding wheel as it came to rest if we take a counterclockwise rotation as positive? Express your answer in radians per second squared. V ΑΣΦ Submit Request Answer Part B ? rad/s2 How many revolutions did the wheel make during the time it was coming to rest? Express your answer as a number of revolutions. ΜΕ ΑΣΦ Submit Request Answer Provide Feedback ? revolutions Next>>
A high-speed drill reaches 2500 rpm in 0.50 s. Part A What is the drill's angular acceleration? Express your answer in radians per second squared. 7VE ΑΣΦ α= Submit rad/s² You have already submitted this answer. Enter a new answer. No credit lost. Try again. Part B 0 = Previous Answers Request Answer ? Through how many revolutions does it turn during this first 0.50 s? Express your answer in revolutions. Π ΑΣΦ ? rev
Part A A210 g ball and a 700 g ball are connected by a 39.0-cm-long massless, rigid rod. The structure rotates about its center of mass at 160 rpm. What is its rotational kinetic energy? Express your answer with the appropriate units. 2.16 J
A diver comes off a board with arms straight up and legs straight down, giving her a moment of inertia about her rotation axis of 18 kg-m². She then tucks into a small ball, decreasing this moment of inertia to 3.6 kg m². While tucked, she makes two complete revolutions in 1.0 s. Part A If she hadn't tucked at all, how many revolutions would she have made in the 1.7 s from board to water? Express your answer using two significant figures. 15] ΑΣΦ N= ? rev
The 5-kg cylinder is initially at rest when it is placed in contact with the wall B and the rotor at A. Part A If the rotor always maintains a constant clockwise angular velocity w = 6 rad/s, determine the initial angular acceleration of the cylinder. The coefficient of kinetic friction at the contacting surfaces B and C is uk = 0.2. (Figure 1) Express your answer with the appropriate units. ? a = Value Units Submit Request Answer Figure 1 of 1 Provide Feedback Next > 125 mm 45 P Pearson
A 0.74-m-diameter solid sphere can be rotated about an axis through its center by a torque of 12.8 m * N which accelerates it uniformly from rest through a total of 160 revolutions in 16.0 s. Part A What is the mass of the sphere? Express your answer to two significant figures and include the appropriate units. M = O μA Submit Value Units Request Answer ?
At its lowest setting a centrifuge rotates with an angular speed of ω1 = 350 rad/s. When it is switched to the next higher setting it takes t = 12.5 s to uniformly accelerate to its final angular speed ω2 = 750 rad/s. a. Calculate the angular acceleration of the centrifuge a1 in rad/s2 over the time interval t b. Calculate the total angular displacement (in radians) of the centrifuge, Δθ, as it accelerates from the intial to the final speed.
5. A 108 cm, 0.73 kg golf club is swung from rest for 0.5 seconds with a constant acceleration of 10 rad/s2.a. What is the angular velocity of the club head when it impacts the ball? b. What is the angular momentum of the club head when it impacts the ball? please show all steps, work, and formulas
A wind turbine has 12,000 kg blades that are 37 m long. The blades spin at 22 rpm. Part A If we model a blade as a point mass at the midpoint of the blade, what is the inward force necessary to provide each blade's centripetal acceleration? Express your answer with the appropriate units. F= Valye HÅ Submit Request Answer Provide Feedback G → Units ? N
B1
Dario, a prep cook at an Italian restaurant, spins a salad spinner and observes that it rotates with constant speed 20.0 times in 5.00 seconds and then stops spinning it. The salad spinner rotates 6.00 more times before it comes to rest. Assume that the spinner slows down with constant angular acceleration. Part A What is the magnitude of the angular acceleration of the salad spinner as it slows down? Express your answer numerically in radians per second per second. ▸ View Available Hint(s) a = 8.38 radians/s² Submit ✓ Correct Part B Previous Answers How long does it take for the salad spinner to come to rest? Express your answer numerically in seconds. ▸ View Available Hint(s) t = Templates Symbols undo redo reset keyboard shortcuts help, S