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A playground merry-go-round has radius 2.20m and moment of inertia 2800 kg*m^2 about a vertical axle through its center, and it turns with negligible friction. A child applies an 23.0 N force tangentially to the edge of the merry-go-round for 25.0 s . If the merry-go-round is initially at rest, what is its angular speed after this 25.0 s interval? How much work did the child do on the merry-go-round? What is the average power supplied by the child?
A block of mass 16.7 kg supported by a vertical massless cable is initially at rest. The block is then pulled upward with a constant acceleration of 4.89 m/s2. a) What is the tension in the cable? b) What is the magnitude of the net force acting o..
A 59 g ball attached to a spring with spring constant 2.9 N/m oscillates horizontally on a frictionless table. Its velocity is 15.4 cm/s when x=-4.79 cm. What is the ball's maximum acceleration
A 0.400-kg bead slides on a frictionless, curved wire, starting from rest at pt A, Find the speed of the second bead just after the collision
Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. The electric field at a point , which is 0.50 m from the center of the sphere, is 15,000 N/C and is directed radially outward. What is the maximum magnitude o..
Our apparent weight is actually judged not by the force of gravity pulling on us, By what percent will your apparent weight change if you were to travel from the north pole to the equator
a stationary orbit is done with a period equal to the time it takes the planet to revolve one time so that the satellite appears to remain at the same point in the sky all the time. Find the radius of a stationary orbit
The question below was asked before, but this seems to ignore that the launching machine should have static friction as well, How far would the launching machine slide on the Moon
The number of electrons in a copper penny is approximately 10*10^23, How large would the force be on an object if it carried this charge and were repelled by an equal charge one meter away?
An intergalactic rock star bangs his drum every 1.50 s. A person on earth measures that the time between beats is 2.30 s. How fast is the rock star moving relative to the earth
Find out the maximum height that the rocket reaches (neglecting air resistance) when the fuel is exhausted.
A bicycle whose tires have a diameter of .700 m accelerates from rest at a constant rate, Find the angular acceleration of the wheels
A 13 N force with a fixed orientation does work on a particle as the particle moves through displacement d=(2i-5j+4k)m. What is the angle between the force and the displacement
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