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The simple 2 kg pendulum is released from rest in the horizontal position. As it reaches the bottom (vertical) position the cord wraps around the smooth fixed pin at A and continues in the smaller arc in the vertical plane. Calculate the magnitude of the force R supported by the pin at A when the pendulum passes the 30o position.
A professor's office door is 0.9 wide, 2.0 high, and 4 thick; has a mass of 25; and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame.
a vessel at rest explodes breaking into three pieces. two pieceshaving equal mass fly off perpendicular to one another
All "simple machines" (pulleys) operate via the same principle. Explain how relative amounts of force used , distance traveled and work done apply to these machines
An ideal monatomic gas with 3.6mol undergoes a reversible increase in temperature from 380 K to445 K at constant volume. What is the entropy change of the gas
A train is moving east on a straight track with a speed of 12.9 m/s. What is the speed of the raindrops with respect to the ground
An ideal (Carnot) freezer in a kitchen has a constant temperature of 263 K, whereas the air in the kitchen has a constant temperature of 303 K. Suppose the insulation for the freezer is not perfect and conducts energy into the freezer at a rate of 0...
Three children, each of weight 356N, make a log raft bylashing together logs of diameter 0.30m and length 1.80m. How many logs will be needed to keep them afloat in fresh water
If the elastic limit of steel is 5.0 multiplied by 108 Pa, determine the minimum diameter a steel wire can have
Two ice skaters, with masses of 50.0 kg and 85.0 kg, are at the center of a 60.0 m-diameter circular rink. how long does the lighter skater take to reach the edge
The positron is the electron's antiparticle. It has the same mass as the electron but has an opposite charge (+e). How much energy is required to ionize positronium from its ground state
A water line with an internal radius of 5.06 x 10-3 m is connected to a shower head that has 12 holes. The speed of the water in the line is 1.18 m/s. What is the volume flow rate in the line
In San Francisco, a very simple technique is used to turn around a cable car when it reaches the end of its route. what is the magnitude of the net torque applied to the car
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