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1. A wrench is accidentally dropped from a building 90. m above the ground.
(a) How long will it take for it to hit the ground?
(b) How fast will the wrench be moving when it hits the ground?
A 40-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, kinetic energy decreases to 240J from 470J. How high does she rise during this interval? Avoid air resistance.
a total of 8.77middot106 electrons are placed on an initially uncharged wire of length 1.87 m. what is the magnitude of
A ball attached to a string is twirled in a circle of radius 1.25 m. If the constant speed of the ball is 2.25 m/s, what is the period of the circular motion
which of the following represents work: A compressed spring that is allowed to expand. The normal force on a stationary crate. The frictional force on a crate that is being pushed across a flat floor.
In an emergency stop to avoid an accident, a shoulder strap seatbelt holds a 60 kilogram passenger in place. find the average force applied to the passenger by the seat belt
A 4mC charge passes through the point (3m, 4m) at a speed of 100m/s. Find the components of the magnetic force felt by the charge
around the core of a nuclear reactor shielded by a large pool of water cerenkov radiation appears as a blue glow.
Suppose a long solenoid is wound with 1000 turns per meter and the current in the windings is increasing at the rate of 100.0 A/s. What is the rate of change of the flux in the solenoid
Suppose that workers involved in manufacturing are paid less than all other workers in the economy. What would be the effect on the real income distributionwithin the economy if there were a substantial tariff levied on manufactured goods?
A single slit has a width of 2.10x10^-6 m and is used to form a diffraction pattern. Find the angle that locates the second dark fringe
Two rockets are each 1000m long in their rest frame. Rocket 1,traveling at .9*c relative to earth, in over taking rocket 2.Rocket 2 is only moving at .5*c. According to the crew on rocket 2,how long does it take for rocket 2 to completely pass?
Assuming that the impact is perfectly plastic, determine the velocity of the mass center G of the panel immediately after the impact
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