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An athlete catches a ball traveling at 20 m/s with her hands. Between the time she makes contact with the ball and the time the ball stops moving, the ball travels a distance of 20 cm. The goaltender feels a force of 500 N against her hands when she stops the ball. What is the mass in kg of the ball?
After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 1.69 km away. What distance did the dog run
A 4.4 cm radius ball rolls down an inclined plane from rest at the top. The angular acceleration of the rolling ball about its center is 185 rad/s^2, How long is the plane
In a hydraulic lift, the maximum gauge pressure is 14.3 atm. If the diameter of the output line is 23.7 cm, what is the heaviest vehicle that can be lifted
A large storage tank, open to the atmosphere at the top and filled with water, Determine the speed at which the water leaves the hole
A nail with a diameter of 1.00 mm projects 25.0 mm horizontally outward from a wall. how much does the nail deflect downward
An AC adapter for a laptop computer unit uses a transformer to reduce the line voltage of 110 V (rms) to a voltage of 18.5 V. What is the rms current delivered to the transformer
A roller coaster, traveling with an initial speed of 15 meters per second, decelerates uniformly at -7.0 meters per second per second to a full stop
A tennis player swings her 1000g racket with a speed of 12m/s . She hits a 60g tennis ball that was approaching her at a speed of 17m/s. what is the average force that the racket exerts on the ball
A heat engine is to be built to extract energy from the temperature gradient in the ocean. what is the maximum efficiency such an engine can have
A uniform ball with a mass of 125 is rolling without slipping along the horizontal surface of a table with a speed of 4.5 m/s, What is the rotational kinetic energy of the ball
How high a tree would a 79.0 kg person have to climb to increase his gravitational potential energy relative to the ground by that amount.
While a person is walking, his arms swing through approximately a 45.0 degree angle in 0.510 s. What force would the blood vessel exert if the arm were not swinging
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