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The combination of an applied force and a friction force produces a constant total torque of 35.2 N · m on a wheel rotating about a fixed axis. The applied force acts for 6.10 s. During this time, the angular speed of the wheel increases from 0 to 10.5 rad/s. The applied force is then removed, and the wheel comes to rest in 59.4 s. (a) Find the moment of inertia of the wheel. 1 kg · m2 (b) Find the magnitude of the torque due to friction. 2 N · m (c) Find the total number of revolutions of the wheel during the entire interval of 65.5 s. 3 revolutions
Sam (85 kg) takes off up a 50-m-high, 10° frictionless slope on his jet-powered skis. The skis have a thrust of 240 N. He keeps his skis tilted at 10° after becoming airborne. How far does Sam land from the base of the cliff.
A convex mirror has a radius of curvature of 89 cm. An image is produced 40 cm in front of the mirror. Where is the object
Three equal point charges, each with charge 1.30 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.600 m. Evaluate the electric potential energy U of the system?
A block of mass 250.0 g is at rest on a plane inclined at 30.0 degrees to the horizontal. Find the speed of the second block when it has fallen 35.0 cm
Runner A is initially 3.0 mi west of a flagpole and is running with a constant velocity of 3.0 mi/h due east. How far are the runners from the flagpole when they meet
Two particles each have a mass of 6.1 x 10-2 kg. One has a charge of +4.1 x 10-6 C, and the other has a charge of -4.1 x 10-6 C. They are initially held at rest at a distance of 1.0 m apart. Both are then released and accelerate toward each other. Ho..
Charges of 4.0 mC and - 6.0mC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field created by these two charges
A low-power laser used in a physics lab might have a power of 0.55 mW and a beam diameter of 2.6 mm. Calculate the average light intensity of the laser beam
A rocket ship at rest in space gives a short blast of its engine, firing 90 kg of exhaust gas out the back end with an average velocity of 700 m/s.
A ship on the surface of the ocean receives a sonar echo back from an underwater object. What is the distance of the object from the ship
Suppose you carry a bag of groceries weighing 100 N from your car to your kitchen, a distance of 61 m, without raising or lowering the bag
a man is standing near a gate and a flag pole. The gate is 15 ft from the pole. If the pole is h=35 ft tall, how far is the man from the gate
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