College Physics
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ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A 90-horsepower outboard motor at full throttle will rotate its 15in long propellers at 5000rpm. What is the linear speed in mph of the tip of one of the propellers?
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- A ceiling fan with 89-cmcm-diameter blades is turning at 70 rpmrpm . Suppose the fan coasts to a stop 30 ss after being turned off. Through how many revolutions does the fan turn while stopping?arrow_forwardRefer to the question below.arrow_forward18. Figure P10.18 shows the drive train of a bicvcle that has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long. The cyclist pedals at a steady cadence of 76.0 rev/min. The chain engages with a front sprocket 15.2 cm in diameter and a rear sprocket 7.00 cm in diameter. Calculate (a) the speed of a link of the chain relative to the bicycle frame, (b) the angular speed of the bicycle wheels, and (c) the speed of the bicycle rela- tive to the road. (d) What pieces of data, if any, are not necessary for the calculations? Rear sprocket Pedal crank Front sprocket Chain Fiqure P10.18arrow_forward
- The spool has a mass, m, and a radius of gyration, kG. An inextensible is wrapped around the inner diameter of the spool and is attached to the wall a point A. The coefficient of friction between the floor and the spool is mu. If the spool has the initial angular velocity given as omega naught, how far will the center, G, move before stopping?arrow_forwardQuestion is on the picturearrow_forwardCalculate the angular speed, in rads of a flywheel turning at 750.0rpmarrow_forward
- he diameters of the main rotor and tail rotor of a single-engine helicopter are 7.56 m and 1.06 m, respectively. The respective rotational speeds are 447 rev/min and 4,150 rev/min. Calculate the speeds of the tips of both rotors. main rotor m/s tail rotor m/s Compare these speeds with the speed of sound, 343 m/s. vmain rotor = vsound vtail rotor = vsoundarrow_forwardA wheel has a moment of inertia of m?. Its initially rotating at 7.97kg 2 7500 revolutions per minute, How much energy is required to bring it rest?arrow_forwardProblem An electric motor provides a constant torque of 12 N.m on a pivoting flywheel which has an inertia around the shaft of 3 kg.m2 and a friction constant of 3 kg.m2 / s. Motor it starts with silence. Zero tolerance is expressed in 2% to face value. 1. Calculate the total work done by the torque from rest until equilibrium is reached angular velocity! 2. Calculate kinetic energy when angular velocity equilibrium is reached! 3. Calculate the average power given by the motor from idle until it is reached equilibrium!arrow_forward
- A 1.7 kgkg , 20-cmcm-diameter turntable rotates at 140 rpmrpm on frictionless bearings. Two 450 gg blocks fall from above, hit the turntable simultaneously at opposite ends of a diameter, and stick. What is the turntable's angular velocity, in rpmrpm, just after this event? Express your answer to two significant figures and include the appropriate units.arrow_forwardThe good expert Hand written solution is not allowed.arrow_forwardConsider a phonograph with a diameter of 0.6 m and a rotational speed of 33 RPM. Answer the following questions. What is its radius in m?What is its rotational speed in rad/s?What is the tangential speed on the phonograph's outer edge in m/s?What is the tangential speed at the center of the phonograph in m/s?What is the tangential speed halfway out to the edge of the phonograph?arrow_forward
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