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A metal rod (2.4 kg, 1.5 m long) is rotating about an axis through its center at 20.0 rad/s. Calculate its rotational kinetic energy. The moment of inertia is given by I=(1/2)ML^2.
A transformer with 1710 turns on the primary and 229 turns on the secondary is used in an electric slot car racing set to reduce the input voltage amplitude of 170 V from the wall output
A bicycle wheel is rotating at 45 when the cyclist begins to pedal harder, giving the wheel a constant angular acceleration of 0.42.
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 13.1 rpm in 10.7 s. what force is required at the edge
During a violent storm, the wind over a flat, 200 m2 roof has a velocity of 10 m/s. What is the net force on the roof
Four particles with masses 4 kg, 2 kg, 4 kg, and 2 kg are associated by rigid rods of negligible mass. The origin is centered on the mass in the lower left corner, and all the particles are located in Quadrant 1. The rectangle is 5 m wide and 4 m ..
A little cat, Bella, walks in a straight line, which we shall call the x axis, with positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function..
A lead fishing weight with a mass of 57.0g absorbs 146cal of heat. If its primary temperature is 50 C, what is its final temperature.
In 1975 the roof of Montreal's Velodrome, with a weight of 360 kN, was lifted by 10 cm so that it could be centered. How much work was done on the roof by the forces making the lift.
A neon sign requires 10000 V for its operation. It operates from a 220 V receptacle. What must be the turns ratio Ns/Np of the transformer
A motorcyclist is able to ride on the vertical wall of a bowl- shaped track . his weight is counteracted by the friction of the wall on the tires. what force increase or decrease if he rides faster.
A vacuum cleaner is plugged into a 120.0-V socket and uses 2.4 A of current in normal operation, Find the coil resistance of the motor
A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.
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