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(a) What is the kinetic energy in joules of an 850-lb motorcycle moving at 66 mph?
(b) By what factor will the kinetic energy change if the speed of the motorcycle is decreased to 33mph?
(c) Where does the kinetic energy of the motorcycle go when the rider brakes to a stop?
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.650m from the axis of rotation of the stool. Compute the kinetic energy of the system after the dumbbells are pulled in
A betatron is a charged particle accelerator that works by generating an induced electric field to accelerate the charged particles. What is the amplitude of the oscillating electric field at a distance 0.62 m from the axis of the betatron
Diagnostic ultrasound of frequency 6.10 MHz is used to examine tumors in soft tissue. What is the wavelength in air of such a sound wave
A block of mass M is attached to a spring ofspring constant k and is moving with constant speed in a horizontalcircle on a frictionless table. You measure that the time it takesthe mass to make one complete circle is T seconds.
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 54 dB by an observer 10 km away. What is the average power generated by the horn
The only force acting on a 3.0 kg body as it moves along the positive x axis has an x component Fx = -7x N, What is the velocity of the body at x = 4.9 m
A sealed cubical container 17.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 21.0°C. Find the force exerted by the gas on one of the walls of the container
A parachute dropped from a 30 meter-high clifffalls with a constant velocity of 1.5 meters per second. How long does it take for the stone to hit the ground
A sprinter of mass 66.2 starts his race by pushing horizontally backward on the starting blocks with a force of 190 Determine his initial acceleration as he leaves the blocks
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the diesel fuel. find the temperature of the compressed air
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves on a circle. Find the magnitude of the total acceleration (centripetal plus tangential) ..
Preparing to throw baton A in the air, you hold it at the midpoint and give it a twist with your forearm and wrist that applies a torque of 1.4 m·N for a time interval of 0.50 s. What would be the moment of inertia
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