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Two wheels have the same mass and radius of 4.8 kg and 0.50 m, respectively. One has
(a) the shape of a hoop and the other
(b) the shape of a solid disk.
The wheels start from rest and have a constant angular acceleration with respect to a rotational axis that is perpendicular to the plane of the wheel at its center. Each turns through an angle of 13 rad in 9.4 s. Find the net external torque that acts on each wheel.
A swimming pool has dimensions 32 m 9 m and a flat bottom. The pool is filled to a depth of 1.50m with fresh water. What is the force exerted by water on the bottom.
hree identical small Styrofoam balls (m = 1.81g) are suspended from a fixed point by three nonconducting threads, What is the common charge q carried by each ball
A 52% efficient device uses chemical energy to generate 570J J of electric energy. How much chemical energy is used
A uniform plank of length 4.30 m and weight 226 N rests horizontally on two supports, with 1.10 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 437 N walk on overhanging part of the plank be..
An alpha particle (m = 6.7 ´ 10-27 kg, q = +3.2 ´ 10-19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out an electric potential difference V..
An object is 5.7 cm from a spherical concave mirror. If the image is 4.7 cm tall and 10 cm from the mirror, how tall is the object
At a dock, a crane lifts a 2094 kg container 14 m, swings it out over the deck of a freighter, and lowers the container into the hold of the freighter, How much work is done by the crane on the container?
Swift is a spacecraft that has a collecting area of 0.520 m2 to detect gamma-ray bursts (GRBs). find the amplitude of the magnetic field of the source
a bowling ball rolls across a horizontal roof with a speed of 8.57m/s If the roof is 12.5m/s above ground how far from the base of building will the ball land
An electron starts from rest 75.5 cm from a fixed point charge with Q = -0.150 µC. How fast will the electron be moving when it is too far away.
A 15.00 block is attached to a very light horizontal spring of force constant 450 and is resting on a smooth horizontal table. Suddenly it is struck by a 3 stone travelling horizontally at 8 to the right, whereupon the stone rebounds at 2.00 horizont..
An AC generator operates at 22 V and delivers 200 W of power through an ideal (no loss) transformer to the load with the resistance 4.0 \Omega
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