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In figure, a ball is thrown up onto a roof, landing some timelater at height h = 20.0 m above and d = 30.0 mhorizontally from the release point. The ball's path just before landing is angled at θ = 60.0o with the horizontal roof. (a) Find the time of flight. (Hint: One way is to reverse themotion, as if on a videotape.) What are the (b) magnitude and (c)angle (relative to the horizontal) of the ball's initialvelocity?
Three objects lie in the x, y plane. Each rotates about the z axis with an angular speed of6.42 rad/s. Obtain the moment of inertia of the system
If f8 and 1/125 s gives the proper exposure, what f-stop number should be used with 1/500 s under the same light conditions
A building in San Fran has light fixtures consisting of small 2.35kg bulbs with shades hanging from the ceiling at the end of lightthin cords 1.5 m long. If a minor earthquake occurs, how many swings per second will these fixtures make?
Very fine smoke particles are suspended in air. The translational rms speed of a smoke particle is 2.8 x 10-3 m/s, Find the mass of a particle
They are 15.0 m above a fire-fighters safety net. When landing jumper stretches the net 1.0 m before coming to rest. A. what was the average acceleration experienced by the jumper when slowed to rest by the net? B. Is this acceleration positive or ne..
A 3500 kg block falls vertically through 5 m and then collides with a 400 kg pile, driving it 3.0 cm into bedrock. Assuming that the block-pile collision is completely inelastic, find out the magnitude of the average force on the pile from the bed..
A runner of mass m runs around the edge of the horizontal turntable mounted on a vertical, frictionless axis through its center. The runner's velocity relative to earth has magnitude v.
Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume of a cavern is 4.9 Ã- 105 m3, how many homes could this internal energy serve
A stationary particle of charge q = 2.5 x 10-8 C is placed in a laser beam (an electromagnetic wave) whose intensity is 2.6 x 103 W/m2. find the magnitude of the magnetic forces exerted on the particle
A 33.0-mH inductor has a reactance of 2.10 k?. What is the new reactance of the capacitor
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 16.1 s. How tall is the tower
Four charges are arranged on the corners of a square as shown. A fifth charge is located in the middle of the square. What is the net force on that charge?
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