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A boy gets ready to slide down an icy hill with his sled.Assume that the friction from the ground is negligible.
What would the inclination of the hill have to be for the boy to have an acceleration of 5 m/s^2?
How far will the boy have slid after 3 seconds with that acceleration?
How fast will the boy be going after 3 seconds with that acceleration?
As a result of the friction of tides, the earth rotates more slowly as time progresses. Each year the time it takes for the earth to complete one rotation increases by 20microseconds. at what rate [J/(yr*K)] is entropy being generated due to tidal ..
A 12-kg block (M) is released from rest on a frictionless incline that makes an angle of 28 degrees. How far does the block move down the incline from its rest position to the stopping point
As a space craft approaches a planet, the rocket engines on it are fired to slow it down so it will go into orbit around the planet. how long must the engines be fired
If i have a hollow copper sphere that has an outer diameter of 20.00 cm that is floating so that everything is just submerged in a bucket of water
A 20-N horizontal force pushes an object along a rough floor so that the object moves with a constant velocity of 7.0 m/s
A rectangular loop of wire enter a 2.0 T magnetic field with velocity of 10 m/s, find the direction of the force experience by the wire
A small 15{rm g} bug stands at one end of a thin uniform bar that is initially at rest on a smooth horizontal table. The other end of the bar pivots about a nail driven into the table and can rotate freely, without friction.
A mass of 5.6 kg slides across a rough table. After sliding a total distance of 7.3 meters, the mass comes to rest. determine the initial velocity of the mass
A proton moves at 4.9x106 m/s in a magnetic field where B = 0.42 T. what force does the proton experience
You use a HeNe laster, which has a wavelength of 633 nm, What is the vibrational frequency of the vibration corresponding to this peak
A sinusoidal transverse wave travels on a string. The string has length 7.95m and mass 6.45g. what must be the amplitude of the wave
At a construction site workers need to know height of some scaffolding. Assuming acceleration due to gravity is 9.8 m/s^2 what is the height of the scaffolding
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