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An astronaut orbits the earth in a space capsule whose height above the earth is equal to the earths radius. How does the weight of the astronaut in the capsule compare to her weight on earth?
Find the tension in the rope and the force that the mountain climber must exert with her feet on the vertical rock face to remain stationary. Assume that the force is exerted parallel to her legs.
Bo and Luke are running from Roscoe P. Coltrane and are going to jump the General Lee (their car) over the Hazard River. How much time do Bo and Luke spend in the air
A suitcase (mass m = 18 kg) is resting on the floor of an elevator. What pressure (in excess of atmospheric pressure) is applied to the floor beneath the suitcase
What is the maximum positive potential energy. Write down an expression for U as a function of x, with U in joules and x in meters.
You accidentally drop your cell phone, releasing it with an initial velocity of 0 m/s. If it takes 5 seconds to hit the floor, evaluate what is its velocity when it hits the floor
An electron that has a horizontal initial speed of 4.50 106 m/s enters a region that has anelectric field of 120 V/m pointingvertically upward. How long does the electron take to travel19 cm in the horizontal direction?
A merry go round has a moment of inertia of 1000 kgm^2. When it is rotating at 2.62 rad/sec, the motor shut off. How large was the friction torque
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 24.0 s. How tall is the tower
Two cylindrical bars, each with diameter of 2.30 cm, are welded together end to end. One of the original bars is copper and is 0.350 m long
Find what is the inductance of a coil if the coil produces an emf of 2.90 Volt when the current in it changes from -29 mA to +33 mA in 16 milliseconds
Find how far apart must two protons be if the electrical force of repulsion on each one is equivalent to its weight on earth
A 3.00 kg block starts from rest at the top of a 35.5° incline and slides 2.00 m down the incline in 1.30s. Find the acceleration of the block. Discover the frictional force acting on the block. Discover the speed of the block after it has slid 2.00 ..
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