Why is the following situation impossible? In a large city with an air-pollution problem, a bus has no combustion engine. It runs over its citywide route on energy drawn from a large, rapidly rotatingflywheel under the floor of the bus. The flywheel is spun up to its maximum rotation rate of 3 000 rev/min by an electric motor at the bus terminal. Every time the bus speeds up, the flywheel slowsdown slightly. The bus is equipped with regenerative braking so that the flywheel can speed up when the bus slows down. The flywheel is a uniform solid cylinder with mass 1 200 kg and radius0.500 m. The bus body does work against air resistance and rolling resistance at the average rate of 25.0 hp as it travels its route with an average speed of 35.0 km/h.

Step 1:Angular speed of the fly wheel is 3000minrevMass of the fly wheel is 1200kgRadius of the fly…

Answered: Why is the following situation…

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)...

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One end of a cord is fixed and a small 0.400-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 1.50 m, as shown in the figure below. When θ = 23.0°, the speed of the object is 5.50 m/s. An object is swinging to the right and upward from the end of a cord attached to a horizontal surface. The cord makes an angle θ with the vertical. An arrow labeled vector v points in the direction of motion. (a) At this instant, find the magnitude of the tension in the string.Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. N(b) At this instant, find the tangential and radial components of acceleration. at = Your response differs from the correct answer by more than 100%. m/s2 downward tangent to the circle ac = Your response differs from the correct answer by more…
A wheel with a radius of 0.23 m and a mass of 7.31 kg spins about its axis at 6.53 radians per second. What is the kinetic energy of the wheel in J? Treat the wheel as a cylinder of constant density.
A solid brass ball of mass 22 g and radius 8.51 mm rolls smoothly along a loop-the-loop track when released from rest from a tall ramp leading to the loop-the-loop. The circular loop has a 17 cm radius. (a) What is the minimum height from which you can release the ball so that it will go around the loop-the-loop without falling off? For part (b), assume that the ball is released from rest at a height of 61.83 cm above the bottom of the loop. (b) What is the magnitude of the horizontal force on ball when it is at a height 17 cm going up the hoop? (c)What is the direction of the net force on the ball at the top of the hoop? Î =
Find the work done by a force F= 2i (magnitude 2 N) in moving an object along the line from the origin to the point (5,5) (distance in meters). ..... The work done is J.
Consider a basketball player spinning a ball on the tip of a finger. If a player performs 1.95 J of work to set the ball spinning from rest, at what angular speed ? will the ball rotate? Model a basketball as a thin-walled hollow sphere. For a men's basketball, the ball has a circumference of 0.749 m and a mass of 0.624 kg .
An entertainer has perched a 281 g spinning plate on top of a pole. The plate has a radius of 12 cm and is spinning at 68 rpm. A 277 g cup with a moment of inertia of 0.005 kg•m2 is then placed in the center of the plate. The cup beings to spin with the plate. Once the two objects are spinning together, what rate of spin, in revolutions per minute do they have? Answer to one decimal place
An electric motor is used to drive the shaft of a small water pump. During a performance test, the torque on the motor shaft is found to be 7.642 Nm when the motor is drawing 631.33 W of electrical power. What is the rotational speed of the shaft in rpm?
A string is wrapped around a disk of mass m = 2.2 kg and radius R = 0.08 m. Starting from rest, you pull the string with a constant force F = 9 N along a nearly frictionless surface. At the instant when the center of the disk has moved a distance x = 0.12 m, your hand has moved a distance of d = 0.27 m. m d (a) At this instant, what is the speed of the center of mass of the disk? Vcm = m/s (b) At this instant, how much rotational kinetic energy does the disk have relative to its center of mass? Krot = Additional Materials M eBook
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 250 Trad/s. One such flywheel is a solid, uniform cylinder with a mass of 730 kg and a radius of 0.972 m. (a) What is the kinetic energy of the flywheel after charging? (b) If the truck uses an average power of 7.8 kW, for how many minutes can it operate between chargings? (a) Number (b) Number Units Units
An electric motor is used to drive the shaft of a small water pump. During a performance test, the torque on the motor shaft is found to be 6.624 N•m when the motor is drawing 583.61 W of electrical power. What is the rotational speed of the shaft in rpm?
A professor sits on a rotating stool that is spinning at 10.010.0 rpm while she holds a heavy weight in each of her hands. Her outstretched hands are 0.7750.775 m from the axis of rotation, which passes through her head into the center of the stool. When she symmetrically pulls the weights in closer to her body, her angular speed increases to 24.524.5 rpm. Neglecting the mass of the professor, how far are the weights from the rotational axis after she pulls her arms in?
Trucks can be run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 683 rad/s. One such flywheel is a solid, uniform cylinder with a mass of 535 kg and a radius of 1.2 m that rotates about its central axis. What is the kinetic energy of the flywheel after charging? If the truck uses an average power of 8.4 kW, for how many minutes can it operate between chargings?

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