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A puck with mass 0.28 kg moves in a circle at the end of a string on a frictionless table, with radius 0.75 m. The string goes through a hole in the table, and you hold the other end of the string. The puck is rotating at an angular velocity of 18 rad/s when you pull the string to reduce the radius of the puck's travel to 0.55 m. Consider the puck to be a point mass. What is the new angular velocity of the puck?
Romeo is chucking pebblesgently up to Juliet's window, and he wants the pebbles to hit thewindow with only a horizontal component of velocity. How fast are the pebbles going when they hit her window
a space probe with a rest mass of 8.2107kg and a speed of 0.5c smashes into an asteroid at rest and becomes embedded
A large man sits on a four-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg, what pressure does each leg exert on the floor
The fresh water behind a reservoir dam is 15.0 m deep. A horizontal pipe 2.50 cm in diameter passes through the dam 7.5 m below the water surface, What volume of water flows out of the pipe in 4.0 hours
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. It collides with and sticks to a rod of mass M = 2.0 kg and length L = 0.9 m which pivots about a fixed vertical axis at the opposite end of ..
A proton is located at y=0.06m and has a velocity of 5x10^6 m/s in the +x direction while an electron is located at x=0.08m, What is the magnetic field generated by these two charges at the origin
a car accelerates from 23 ms to 28 ms while travelling a distance of 1.97 m due to a 97800-n net force acting on it.
q1. if work function 1.85 ev wavelength 410 nm what is stopping potential and maximum speed of photoelectrons emitted
A golf ball is struck at ground level. The speed of the golf ball as a function of time is shown in the figure below, where t = 0 at the instant the ball is struck. What is the maximum height above the ground level attained by the ball
Two skaters, one with mass 65 kg and the other with mass 40 kgstand on an ice rink holding a pole of length 10 m and negligible mass. How far does the 40 kg skater move
A standing observer perceives a train whistle to have a frequency of 300 Hz. calculate the frequency of the sound waves emitted from the train
A ladder 7.05 m long leans against the side of a building. If the ladder is inclined at an angle of 76.0° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building
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