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An object is released from rest when it is a height habove the surface of a planet of mass M and radiusR. What is the speed of the object just before striking the surface of the planet? Neglect any air resistance.
Big Ben, the Parliament tower clock in London, has an hour hand 2.70 m long with a mass of 300 kg, and a minute hand 4.20 m long with a mass of 100 kg, Calculate the total rotational kinetic energy of the two hands
A 3.0-kg cart is rolling along a frictionless, horizontal track towards a 1.3-kg cart that is held initially at rest. What is the total momentum of the system of the two carts at this instant
A proton accelerates from rest in a uniform electric field of 652 N/C. At some later time, its speed is 1.26 106 m/s. How far has it moved in that interval
electronics and inhabitants of the international space station generate a significant amount of thermal energy that the
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
As shown on the right, a uniform boom with a mass of 30.0 kg and a length of 2.00 meters is suspended at its left end by a low friction bearing and supported at its right end by a low mass horizontal steel wire of diameter 4.00 mm. A 20.0 kg mass ..
A solenoid that is 75 cm long produces a magnetic field of 1.4 T within its core when it carries a current of 7.6 A. How many turns of wire are contained in this solenoid
A person exerts a force of 68N on the end of a door 75cm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door
Solid disk of radius 0.5m and mass 5kg is rotating countercw about central pivot with ω=10sec^-1. A constant fictional foce of 3N aplpied on outer edge is used to slow disk to a stop. How long in time does it take for the disk to stop? How many re..
A woman throws a ball at a vertical wall d = 3.0 m away. The ball is h = 1.5 m above ground when it leaves the woman's hand with an initial velocity of 12 m/s at 45°.
A small ball rolls horizontally off the edge of a tabletop that is 1.24 m high. What is its speed at the instant it leaves the table
A uniform, solid, right, circular cylinder rolls down an 4.00 m incline without slipping. How fast will the cylinder be rotating at the bottom
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