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Two pool balls of equal mass collide. The first ball has an initial speed of 4 m/s, and the second ball is initially at rest. If the collision is elastic, what is the final speed of the first ball?
A ball of mass 5.0 Kg is lifted off the floor a distance of 1.7 m. what is the kinetic energy of the ball just before it hits the floor? What is its velocity
A 64-kg runner rounds a circular track of radius 63.7 m at a constant 5.30 m/s. Find the magnitude of her momentum changes after she has gone one-fourth of the circle
A man stands on a platform that is rotating (without friction) withan angular speed of 1.94 rev/s; what is the resulting angular speed of the platform
A clarinetist, setting out for a performance, grabs his 3.19-kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 36.0 N. Find the case\'s vertical acceleration
a 900 kg crate is on a rough surface inclined at 30 degrees. a constant force p7200n is applied horizontally to the
The water skier has a mass of 73 kg. Find the magnitude of the netforce acting on the skier
it takes the elevator in a skyscraper 3 s to reach its cruising speed of 8.08 ms. a 78 kg passenger gets abord on the
A mass of 1/4 slug is attached to a spring having a spring constant of 1 lb/ft. The mass is started in motion by initially displacing it 2ft. in the downward direction and giving it an initial velocity of 2 ft/sec in the upward direction. Find
In a Young's double slit experiment, the slit separation is made to be exactly 4?. At what angle will the third bright fringe to the side of the central fringe occur? Caution: the angles involved are such that the approximation sin? is not valid.
The orbits of synchronous communications satellites have been chosen so that viewed from Earth they appear to be stationary. Find the radius of the orbits
A passenger on a boat moving at 1.20 m/s on a still lake walks up a flight of stairs at a speed of 0.50 m/s. What is the velocity of the passenger relative to the water
three balls of equal mass are fired from the same position at a height h above horizontal ground with equal speeds. the
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