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Piles of snow on slippery roofs can become dangerous projectiles as they melt. Think a chunk of snow at the ridge of a roof with a pitch of 30 degrees. Because the snows begin to melt it will eventually slip. Assuming that the distance from the chunk to the edge of the roof is 5.0 m and that the coefficient of kinetic friction is 0.20, calculate the speed of the snow chunk when it slides off the roof. (Note: A free body diagram is needed for this question.)
A 3.0 millimeter diameter ball bearing has 3.0 × 109 excess electrons. Determine what is the ball bearing potential
a truck moving at 13.3 m/s hits a concrete wall. what is the average force exerted on the wrench by the wall
The string of a conical pendulum is 54.0 cm long and the mass of the bob is 0.27 kg. Find the angle between the string and the horizontal when the tension in the string is eight times the weight of the bob
a golfer strikes a ball so that it flies a distance d away landing a height h above its original elevation. the time of
A defibrillator consists of a 15.3-µF capacitor that is charged to 8.4 kV. What is the average power delivered to the tissues?
A puck of mass 0.1 kg slides in a circular path on a horizontal frictionless table at an angular velocity ? of 20 rad/s. What happens to the angular velocity of rotation
The bar is held by a cord that makes a 90? angle with respect to bar and 50 ? with respect to wall. Illustrate what is the magnitude of the horizontal force Hx on the pivot? The acceleration of gravity is 9.8 m/s2.
The figure below shows two points in an E-field: Point 1 is at (x1, y1) = (5,4) in m, and Point 2 is at (x2,y2) =(12,12) in m. The Electric Field is constant, with a magnitude of 56 V/m, and is directed parallel to the +x-axis. The potential at point..
a 120 g ball attached to a spring with spring constant 2.9 nm oscillates horizontally on a frictionless table. its
An X-ray beam of wavelength 0.01nm strikes a target containing free electrons. determine The change in wavelength of the scattered x-ray
A research submarine has a 40.0 cm -diameter window 8.10 cm thick. What is the submarine's maximum safe depth
A parallel-plate capacitor is formed from two 9.10cm x 9.10cm electrodes spaced 2 mm apart. The electric field strength inside the capacitor is 5.00*10^6 . What is the charge (in nC) on each electrode ?What is the final velocity of the electron.
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