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A student sits on a freely rotating stool holding two weights, each of mass 3.09 kg. When his arms are extended horizontally, the weights are 1.08 m from the axis of rotation and he rotates with an angular speed of 0.753 rad/s. The moment of inertia of the student plus stool is 3.09 kg·m2 and is assumed to be constant. The student pulls the weights in horizontally to a position 0.302 m from the rotation axis.
(a) Find the new angular speed of the student.(b) Find the kinetic energy of the student before and after he pulls the weights inward.
a particle of mass 0.350 kg is attached to the 100 cm mark of a meter stick of mass 0.150 kg. the meter stick rotates
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A 1 mL syringe has an inner diameter of 4.0 mm, a needle inner diameter of 0.220 mm, and a plunger pad diameter (where you place your finger) of 1.20cm.
A golf ball of mass 4.50 x 10^-2 kg is struck by a club. Contact lasts 2.31 x 10^-4 s, Compute the average force the club exerts on the ball
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A camera has a lens(or combination of lenses) like the converging lens that focuses light from objects into real images ona piece of film. an enlarger shines light through a negative, anduses a lens to project a real image of the picture on the ne..
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This is because of the average release of about 0.03 J per kilogram each year. Show that at 500 C increase in temperature for a thermally insulated chunk of granite takes about 13.3 million years. (Assume that the specific heat of capacity c of g..
a 2598.79 lbs. go cart and driver rounds a curve. If the centripetal force on the go cart and driver is 1250 lbs. What is the radius of the curve
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A 120-V motor has mechanical power output of2.10hp. It is84.0%efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
a mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.24 cm.a if the spring
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