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A 36-kg skier coasts up a snow-covered hill thats makes anangle of 25o with the horizontal. The initial speed ofthe skier is 6.6m/s. After coasting a distance of 1.9 m up theslope, the speed of the skier is 4.4 m/s.
(a) Find the work done bythe kinetic frictional force that acts on the skis.
(b) what is the magnitude of the kinetic frictional force?
A certain gyroscope consists of uniform disk with a 50 cm radius mounted at the center of an axle that is 11 cm long and of negligible mass. what is the precession rate
A golf ball of mass 0.045 kg is hit off the tee at a speed of 32m/s . The golf club was in contact with the ball for 3.10×10?3s. Find the impulse imparted to the golf ball
A 72 kg skier is going down a slope oriented 37° above the horizontal. Determine the pressure that each ski exerts on the snow
An ideal gas at 11.7 °C and a pressure of 2.42 x 105 Pa occupies a volume of 3.84 m3. How many moles of gas are present
A 120cm3 box contains helium at a pressure of 1.50atm and a temperature of 80.0?C. What is the initial thermal energy of each gas
Suppose the skin temperature of a naked person is 34.3 °C when the person is standing inside a room whose temperature is 21.3 °C. Assuming the emissivity is 0.673, find the net loss of radiant power from the body
A taut rope has a mass of 0.160 kg and a length of 3.40 m. What power must be supplied to the rope in order to generate sinusoidal waves having an amplitude of 0.120 m and a wavelength of 0.490 m and traveling with a speed of 31.5 m/s?
In a region where there is an electric field, the electric forces do +8.00x 10^-19 J of work on an electron as it moves from point X to point Y.What is the potential difference, VY - VX, between point Y and point X?
A rescue helicopter lifts a 85.3-kg person straight up by means of a cable. Use the work-energy theorem and find the final speed of the person
q.water flows over a dam at the rate of 670 and falls vertically 78 before striking the turbine blades.estimate the
The coefficient of performance of a refrigerator is defined as the ratio of heat extracted from the refrigeration compartment to the work required to operate the refrigerator
A block with a mass of 40 kg is on an inclined plane with an angle of 20 degrees. Determine the normal force on the block
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