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A spring (k=100 N/m) is compressed by 0.05 m. When it releases, it spins up a solid disc (m = 0.1 kg, r =0.03 m) that is initially at rest. What angular speed does the disc obtain?
An electrically neutral model airplane is flying in a horizontalcircle on a 3.0m guideline, which is nearly parallel to theground. The line breaks when the kinetic energy of the plane is 50.0 J. Reconsider the same situation, except that now there..
The height of a helicopter above the ground is given by h = 2.80t3, where h is in meters and t is in seconds. How long after its release does the mailbag reach the ground
You have a concave spherical mirror with radius of curvature equal to 50 cm. Where do you have to place an object so that its image wouldbe real and twice the size of the object? Will the image be upright orinverted?
what is the magnitude of the first 2nd and 3rd wire i 5.4a b 3.06cm l 32.2 cm. there is three wires label 123 and b is
The fielder then attempts to throw the ball to the base ahead of the runner. If a base-runner can run from 3rd base to home plate in 4.0 sec, how fast must the centerfielder's throw leave his hand if he makes the catch then immediately throws the ..
A thin, cylindrical rod L = 20.6 cm long with a mass m = 1.20 kg has a ball of diameter d = 6.00 cm and mass M = 2.00 kg attached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure be..
You want to lift a heavy box with a mass of 98 kg using a two pulley system. If you lift the box by 1 m, how much work is done by gravity
A computer to be used in a satellite must be able to withstand accelerations of up to 25 times the acceleration due to gravity. What is the minimum amplitude of vibration that must be used in this test
A 4.00-kg mass is placed at (4.00, 3.00) m and a 6.00-kg mass is placed at (3.00, ?4.00) m. What is the moment of inertia of this system of masses about the x-axis
A magnetic field of 3 Tesla is oriented into the page. A 10 cm long conducting bar is pulled to the right at a constant speed of 3.4 m/s. What is the power supplied by the person pulling the bar
A battery has an internal resistance of 0.014 Ω and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.70V?
A lead brick with the dimensions (6.0 cm leftto right, 5.0 cm front to back and 2.0 cm top to bottom) rests on arough, solid surface. Find the change in height of the brick
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