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A manchine part has the shape of a uniform sphere of mass 225g and diametere 3.00cm. It is spinning about a frictionless axle through its center, but at one point on its equator it is scraping against metal, resulting in a frictional force of 0.0200N at that point. If the rotational speed of the part is 22.5rad/s at t=0s, how long will the part spin until it stops?
A 1400kg sports car accelerates from rest to 90m/s in 26.9s . How much work is done on the car by the engine, What is the average power delivered by the engine
Imagine a test particle of mass m at the point on the Earth's surface closest to the moon. Compute the ratio of the differential tidal force |delta F| acting on this particle
A 3.00 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.20 m/s2, find out the force exerted by the rope on bucket of water.
Two small nonconducting spheres have a total charge of 93.1 ?C. When placed 1.01 m apart, the force each exerts on the other is 11.5 N and is attractive. What is the charge on each?
An asteroid with a rest mass of 8.2 1011 kg is observed to have a relativistic momentum of magnitude 4.54 1020 kg · m/s
In 1911, Ernest Rutherford discovered the nucleus of the atom by observing the scattering of helium nuclei from gold nuclei. If a helium nucleus with a mass of 6.68 10-27 kg.
Two negative and two positive point charges (magnitude = 3.64mC) are positioned on opposite corners of a square (each side = 0.155 m).Determine the magnitude of the force on each charge.
How much time after engine failure will elapse before the rocket comes crashing down to the launch pad?
q1. a student who weighs 510 n is wearing a backpack that weighs 70 n. the student is standing still on a level ground.
A 220 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.150 s. If the total energy of the system is 3.50 J.
A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
1. an object moves along the x axis according to the equation x3.00t 2 -2.00t3.00 where x is in meters and t is in
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