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A cart for hauling ore out of a gold mine has a mass of 447 kg, including its load. The cart runs along a straight stretch of track that is sloped 4.93° from the horizontal. A donkey, trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 539-N force for a distance of 151 m by means of a rope that is parallel to the ground and makes an angle of 13.5° with the track. The coefficient of friction for the cart\'s wheels on the track is 0.0145. Take g = 9.81 m/s2. Find the work that the donkey performs on the cart during this process.
Find the work that the force of gravity performs on the cart during the process.
Calculate the work done on the cart during the process by friction.
assume a bar 2 m long expands 0.6 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated.
Two speakers, one directly behind the other, are each generating a 429-Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Take the speed of ..
A ship is floating on a lake. Its hold is the interior space beneath its deck; the hold is empty and is open to the atmosphere. What volume of water per second leaks into the ship
If 100,000 MHz radar waves are incident on a plane coated with a polymer whose index of refraction is n = 1.50, how thick would you make the coating
A 10-A current flows for two minutes. How much charge has passed through this circuit
A full length mirror on a closet door is 2.0 m tall. The bottom touches the floor. How long is the streak of reflected light across the floor
what is the direction of its velocity relative to the frame of reference.
A 79, 37--long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 ball of clay travelling horizontally at 2.6 hits and sticks to the extremely bottom tip of the rod.
find the coefficient of linear expansion for the material of which the rod is made.
A 22 kg box is released on a 34.0° incline and accelerates down the incline at 0.271 m/s2. How large is the coefficient of friction
Evaluate maximum altitude?
make Use of a 9.81 m/s^2 for the magnitude of the acceleration due to gravity.
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