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A 68.4-kg skier coasts up a snow-covered hill that makes an angle of 25.5 ° with the horizontal. The initial speed of the skier is 9.71 m/s. After coasting a distance of 1.09 m up the slope, the speed of the skier is 3.05 m/s.
(a) Find the work done by the kinetic frictional force that acts on the skis.
(b) What is the magnitude of the kinetic frictional force?
A fireman d = 46.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of θi = 38.0°, at what height will the stream of water strike the building
A certain car battery with a 12.0 V emf has an initial charge of 115 A·h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how various hours can it deliver energy at the rate of 110 W.
The experiment you did in lab is repeated, using a uniform metal bar that is 80.0 cm long instead of the meterstick. Since the bar is uniform, What is the mass of the bar?
A 72-kg base runner begins his slide into second base when he is moving at a speed of 3.9 m/s. How far does he slide
In a shuffleboard game, the puck slides a total of 12 m before coming to rest. what was the initial speed of the puck
A rail car that weighs 44 N is accelerated at 6.4 m/s/s for 2.9 seconds. How much work is done on the rail car
A highway curve has a radius of 125 m. At what angle should the road be banked so that a car traveling at 27.4 m/s has no tendency to skid sideways on the road.Find an acceleration of box and ramp.
The speed of a 1kg object is 2.0m/s (+/-) .05m/s, meaning its absolute uncertainty is .5m/s, calculate the absolute uncertainty in the kinetic energy
A 7200 kg roller coaster train with a speed of 90.0 km/h brakes to a stop at the end of the ride. How many calories of heat are dissipated by the brakes as a result
In a X-ray tube, electrons are accelerated through a potential of 10, 000V. How much energy does the accelerated electron have
The ball leaves the bat 2.0 ms later with a vertical velocity of magnitude 10 m/s. Illustrate what is the magnitude of the average force of the bat on the ball during the ball-bat contact?
An electric generator contains a coil of 90 turns of wire formed into a rectangular loop 40.0 cm by 35.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T and with Bvec initially perpendicular to the coil's plane. What is the ..
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