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A girl whirls a stone attached to a string 1.0m long in a circle with uniform speed. The ston completes one revolution in 0.5s.
(a) what is the speed of the stone?
(b) what are the centripetal and tangential accelerations of the stone?
(c) calculate the force provided by the rope to maintain the circular motion of the stone if the mass of the stone is 30.0g.
What work is done by the electric forc. begin from rest, a boat increases its speed to 4.00 m/s with constant acceleration. What is the boat's average speed.
Smoking causes blood vessels to constrict. If the average blood vessel radius of a smoker decreases 1.6% Calculate the needed percent increase in pressure
A double speed trap is set up on a freeway. One police cruiser is hidden behind a billboard, and another is some distance away under a bridge. As a sedan passes by the first cruiser, its speed is measured to be 99.7 mph.
An 8.00-mH inductor and a 2.00ohm resistor are wired in series to an ideal battery. A switch in the circuit is closed at time 0, at which time the current is 0. determine the time constant for the circuit
A rock is thrown vertically up at 6.7 m/s. (a) What is it's height when its velocity is 1.35 m/s? (b) Has the rock made it to the highest point in the path?
A firefighter with a weight of 702 N slides down a vertical pole with an acceleration of 2.90 m/s2, directed downward. What are the magnitudes and directions (choose the positive direction up) of the vertical forces
The two organ pipes are joined to form a single organ pipe then it will resonate with what frequency (consider fundamental mode of vibration of organ pipe)
implies a serious limit to such detection. (Note also that the uncertainty is greater if there is an uncertainty in the propagation speeds of the S- and P-waves).
Illustrate what angular speed must such a cylinder have so that the centripital acceleration at its surface equals the free-fall acceleration on Earth?
An object with a mass of 27.0 g displaces 845.0 ml of water when it is completely immersed. What is the buoyant force on the mass
Evaluate the electrostatic energy of two opposite charges
What is magnitude of the greatest force
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