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A young woman on a skateboard is pulled by a rope attached to a bicycle. The velocity of the skateboarder is v = (4.6m/s )x and the force exerted on her by the rope is F= (17N )x + (12N )y. A. Find the work done on the skateboarder by the rope in 20 seconds B. Assuming the velocity of the bike is the same as that of the skateboarder, find the work the rope does on the bicycle in 20 seconds.
A nichrome toaster wire, initially at room temperature, carries 2.72A immediately after it's turned on. What's the temperature of the nichrome then
Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 21m that makes an angle of 50? with the vertical, Calculate Tarzan's speed just before he reaches Jane
When the skateboarder reaches the highest point, how far is this point horizontally from the end of ramp.
water flowing through a hose at 4.0m/s fills a 600l child's wading pool in 8.0min. What is the diameter in cm of the hose
in a Tom's double-slit experiment using 549nm light, a thin piece of plexiglass of refractive index 1.53 covers one of the slits. what is the minimum thickness of the plexiglass
An undamped 1.42-kg horizontal spring oscillator has a spring constant of 29.9 N/m. While oscillating, it is found to have a speed of 2.53 m/s as it passes through its equilibrium positio
During the spin cycle of your clothes washer, the tub rotates at a steady angular velocity of 32.7 rad/s. Find the angular displacement of the tub
The rock reaches a maximum height of 2×10^3 m, above the surface of the planet, before it falls back down. What was the first speed of the rock as it left the astronaut's hand.
A standing wave on a string is produced when one end is fixed and the other is driven by a 76 Hz oscillator, what is the total length of the string in meters
A starship voyages to a distant planet 10 ly away. The explorers stay 4.00yr , return at the same speed, What is the speed of the starship
Illustrate what is the maximum load that can be hung from a copper wire of diameter 0.46 mm? Answer in units of N.
A u-tube with constant cross section is partly filled with water. Engine oil of density 0.8g/cm3 is poured into the right arm (without mixing) until the water level rises 2.0cm. The length of the oil column is then.
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