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A pendulum consists of a ball of mass m=0.5kg attached to a string of length L=0.75m. The ball is pulled aside so that the string makes an angle of 30 degrees with the vertical and is released from rest. Find
(a) the speed V at the bottom of the swing and
(b) the tension in the string at the bottom of the swing.
Determine the effective coefficient of kinetic friction between the wheel and the wet rag.
A house has a floor area of 115 m2 and an outside wall that has an area of 24 m2. The earth's magnetic field here has a horizontal component of 2.50 e 10-5 T that points due north and a vertical component of 4.30 e 10-5 T that points straight down..
A 1.7 kg block and a 2.3 kg block are attached to opposite ends of a light rope. Find the acceleration of the lighter block
A 16.0-? resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 170-V generator. What is the maximum value of the rms current?
Traveling at a speed of 15.2 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. What is the speed of the automobile after 1.15s have elapsed
For many years Colonel John P. Stapp, USAF, held the world's land speed record. He participated in studying whether a jet pilot could survive emergency ejection.
Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? Explain physically why it does or does not agree.
A certain thin, uniform rod has a mass of 2 kg and length 3 m. To what shorter length must you trim it (discarding the smaller part) so that the remaining length has half the original moment of inertia about its end.
In deep space two spheres each of radius 5.00 m are connected by a 3.00 x 10^2 m nonconducting cord. If a uniformly distributed charge of 35.0 mC resides on the surface of each sphere, calculate the tension in the cord.
A particle of mass 2.4x10^-5kg and charge 3.0x10^-6C is accelerated from rest in a uniform electric field of 180 N/C. Find its acceleration in the electric field
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 228 J, What type of process is the overall process
The quantity of charge q (in coulombs) that has passed through a surface of area 2.10 cm2 varies with time according to equation q = 7t3 + 5t + 6, where t is in seconds.
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