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While skiing in Jackson, Wyoming, your friend Ben (of mass 68.6 kg) started his descent down the bunny run, 21.1 m above the bottom of the run. If he started at rest and converted all of his gravitational potential energy into kinetic energy, what is Ben's kinetic energy at the bottom of the bunny run?
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, cylindrical tube 58 ft long. Suppose an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Decide the rotation r..
The skis have a thrust of 189 N and a coefficient of kinetic friction on snow of 0.1. Unfortunatately, the skis run out of fuel after only 9 s. Illustrate what is Sam's top speed?
A coin rests 14.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.440. what is the angular velocity of the turntable
The circuit as shown in the Figure shows a capacitor C, two ideal batteries, two resistors, and a switch S. Initially S has been open for a long time. If it is then closed for a long time, by how much does the charge on the capacitor change
a ball of mass 0.208 kg has a velocity of 1.41 i ms a ball of mass 0.305 kg has a velocity of -0.409 i ms.they meet in
A man throws a stone vertically downward with an initial speed of 11.5 m/s from the roof of a building, 39.0 meter above the ground. Determine the speed of the stone at impact
A closely wound, circular coil with radius 2.40cmhas 850 turns. What must the current in the coil be if the magnetic field at the center of the coil is 0.0600T
Betelgeuse has a radius 650 times that of the sun and a massfifteen times that of the sun. What angle doesthe sun subtend as viewed from the earth
Bonnie and Clyde are sliding 470 bank safe across the floor to their getaway car, What is the safe's coefficient of kinetic friction on the bank floor
The springs of a 1700-kg car compress 4.90mm when its 63.0-kg driver gets into the driver's seat. If the car goes over a bump
A 4.8-m-diameter merry-go-round is initially turning with a 4.3 s period. It slows down and stops in 16 s. Before slowing, what is the speed of a child on the rim
A physics professor demonstrates the Doppler Effect by tying a 550 Hz sound generator to a 1.0-m-long rope and whirling it around her head in a horizontal circle at 120 rpm. Suppose the room temperature is 20oC. What is the highest frequency heard wi..
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