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1. A string is wound around a metal wheel that is free to spin on a frictionless pivot. A hanging mass is connected to the other end of the string. The wheel is given a twist causing it to start rotating at 2.5 rad/s in the counterclockwise direction. All known quantities are shown in the figure.
A. What is the initial velocity of the hanging mass?
B. Estimate the acceleration of the disk?
C. Approximately when does the disk stop? Explain
D. Estimate the velocity of the mass at t=2s.
E. Estimate the acceleration of the mass at t=2s.
You throw a ball vertically upward from the edge of the roof of the Bisdorf building with a speed 15.0 m/s. Find a) the position and velocity of the ball 1.00 s after leaving your hand.
A particular satellite was placed in a circular orbit about 155 mi above Earth, Determine the time required for one complete revolution
You have a wire with a current that points upwards. If you put a compass east of that wire, how would the magnitude and direction of the total magnetic field change
A mass m1 is hanging from a light cord which is strung over a pulley of moment of inertia I and radius R0, What are the tensions in each part of the light cord
Two cylindrical rods are identical, except that one has a thermal conductivity k1 and the other has a thermal conductivity k2. they are placed between two walls that are maintained at different temperatures TW (warmer) and TC (cooler).
A 2,700-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6,270 m/s. The radius of the circular orbit is 8.72 × 10^6 m. What is the acceleration of satellite.
In the figure the man hanging upside down is holding a partner who weighs 505 N. what force must the man apply to his partner in the straight-down position
A 20.0micro F capacitor is charged by a 155.0-V power supply, then disconnected from the power and connected in series with a 0.280-mH inductor, Calculate the oscillation frequency of the circuit
Project Seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about 10000 km2 in area. What would be the frequency of the radiations emitted
A cars brakes can only accelerate the car by -10m/s^2. If the car is going 30m/s when the brakes are applied, how long would it take for the car to come to a stop.
A 4.1-kg block slides down an inclined plane that makes an angle of 29° with the horizontal. Find the coefficient of kinetic friction between the block and plane
A Carnot engine extracts 950J from a 600K reservoir during each cycle and rejects 480J to a cooler reservoir. It operates at 22 cycles per second. Find the work done during each cycle
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