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Near the Earth's surface, a compact car of total mass M is driven on a large, revolving, horizontal, disk-shaped platform which itself rotates about its center at a fixed angular frequency ω. At t = 0, the driver leaves the origin and drives outward along a line painted radially on the platform. The driver attempts to maintain a constant speed v_0 relative to the surface of the disk. Ignore the rotation of the earth and any air resistance but assume friction between the car and the disk, characterized by a coefficient of friction μ. Take the Earth to be an inertial frame.
(a) Use cylindrical coordinates to express the acceleration of the car as a function of time t (in the frame of the Earth).
A 7.0-kg block slides down a frictionless incline making an angle of 60.0° withthe horizontal. What is the total work done on the blockwhen the block slides 1.1 m
The 2011 Porsche Turbo S can go from 0 to 60 mph in 2.9 seconds. It can break from 60 to 0 mph in 93 feet. It has a mass of 1590 kg. What is the average force exerted by the engine
How much heat energy is transferred to or from the gas during each of the three segments?
Ultrasound can be used to deliver energy to tissues for therapy. It can penetrate tissue to a depth approximately 200 times its wavelength. what is the approximate depth of penetration
A crate with a mass of 171.5 kg is suspended from the end of a uniform boom with a mass of 80.3 kg. The upper end of the boom is supported by a cable attached to the wall and the lower end by a pivot (marked X) on the same wall. compute the tensio..
A 52.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. What is the centripetal acceleration of the child
Two identical positive charges exert a repulsive force of 7.4 x10-9 N when separated by a distance of 4.8 10-10 m. compute the charge of each.
what the electrostatic force acts on the proton.
A string is wrapped tightly around the circumference of a wheel with a mass of 1.23 kg and a radius of 0.324 m. What is the initial energy of the system
An engine takes 5 seconds to go from its idling speed of 600 rev/min to 1200 rev/min (a) What is it's angular acceleration?
Two particles having charges of 0.580nC and 20.9nC are separated by a distance of 1.20m. At what point along the line connecting the two charges is the net electric field due to the two charges equal to zero
q1. starting from rest an13 kg block slides13.3 m down a frictionless ramp inclined at 30? from the ?oor to the bottom.
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