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A pendulum consists of a 3.1 kg stone swinging on a 3.8 m string of negligible mass. The stone has a speed of 7.9 m/s when it passesits lowest point. (a) What is the speed when the string is at 57° to the vertical? (b) What is the greatest angle with the vertical that the string will reachduring the stone's motion? (c) If the potentialenergy of the pendulum-Earth system is taken to be zero at the stone's lowest point, what is the total mechanical energy of the system?
question1jims dog sparky runs 45.0 northeast to a tree then 70.0 west to a second tree and at last 25.0 south to a
The area of a typical eardrum is about 5.00 10-5 m2. Calculate the average sound power incident on an eardrum at the threshold of pain
If so how fast will the cars be traveling when they collided? If they did not, what is a distance between the cars at this point.
at the top of a hill with slope angle 25 degrees a snow sled is moving at 5 ms. the sled travels 30 m down the hill
When exposed to the weakest sound it can hear, the ear's energy ofvibration is about 10-19J. If the force constant of theear is 20N/m, what is the amplitude of vibration of the eardrum? How does this compare to the size of an atom(~5 x10-10m)?
The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20; 1990.If the shot was launched from 6 ft above the ground at an initial angle of 42degrees, what was its initial speed.
A coin placed on a turntable rotating at 33.6 rev/min will stay there if its center is placed no further than 8.3 cm from the axis of rotation. compute coefficient of friction between the coin and turntable
calculate the Doppler shift (the difference of the observed and emitted frequencies) for light from a car moving toward you at a speed of 210 m/s
Ohm's Law isvalid when for a given piece of material the ratio V/I is the samefor a wide range of voltages and currents. For anOhmic conducting material the resistivity depends on the electricfield and the current density. Acurrent of 0.5 A exists in..
A 7320 kg satellite has an elliptical orbit. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. Find the work done by the gravitational force when the satellite moves from the ap..
A car travelling east at 41.2 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25 m/s in 3.90 s.
Two waves are traveling in the same direction along a stretched string. The waves are 45.0° out of phase. Find the amplitude of the resultant wave
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