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Starting from rest at the top of a tall, steep ramp, a sphere rolls without slipping to the ground 6.9 m below. At the bottom, its speed is 9.0 m/s. Question The sphere is either solid or hollow: which is it? Physics Assume that air resistance is negligible, and that the sphere's total mechanical energy is conserved. The fact that it's rolling without slipping means it has two kinds of kinetic energy; be sure to account for both. It also means there is a definite relationship between its rotational and linear speeds.
A 30-06 caliber hunting rifle fires a bullet of mass 0.0146 kg with the velocity of 314 m/s to the right. The rifle has a mass of 2.49 kg.
How many conduction electrons are there in a 5.00 diameter gold wire that is 40.0 long? How far must the sea of electrons in the wire move to deliver -39.0 of charge to an electrode
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.0 MJ, What is the moment of inertia of the flywheel
Three uniform spheres are located at the corners of an equilateral triangle. find the magnitude of the initial acceleration of the third sphere
A high diver of mass 50.0 kg jumps off a board 10.0 m above the water. what average force did the water exert on her
a 1cm-tall object placed 20cm front of a concave mirror produces a virtual image that is twice the height of the object. what is the length of the mirror
q1.a 1800-kg jeep travels along a straight 500-m portion of highway from a to b at a constant speed of 10 ms. at b the
Suppose the device is used at a service station to measure the flow rate of gasoline (? = 7.00 102 kg/m3) through a hose having an outlet radius of 2.56 cm. Find the speed of the gasoline as it leaves the hose
A swimmer heads directly across a river, swimming at 1.60 m/s relative to the water. She arrives at a point 58.0 m downstream from the point directly across river, 63 m wide. What is the speed of the river current.
if the radius of the equipotential surface of a point charge is 10.5 m, what are the magnitude and sign of the point charge
Calculate the point between Uranus and the Sun at which an object can be placed so that the net gravitational force exerted on it by these two objects is zero
The density of water is 1.0 x 10^3 kg/m3. Calculate the gauge pressure in the pipe at this location.
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