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Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5[m] diameter and a mass of 250[kg]. Its maximum angular velocity is 1200[rpm] A motor spins up the flywheel with a constant torque of 50 [N*m]. How long does it take the flywheel to reach top speed?
In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.70{\rm m/s} relative to the ground. What is the magnitude of the ball's velocity relative to Juan
A window washer of mass 86 kg stands at a distance d from the midpoint of the scaffold. The tension in the cable nearest the worker is twice the tension in the other. Illustrate what is the tension in the cable nearest the worker? What is the tens..
How to compute Average power output
A pendulum consists of a .155 kilograms ball hanging from a light thread, find the angle the pendulum string makes with the Vertical when the system is in equilibrium
An earth satellite is observed to have a height of pergee of 210 Kilometers and a height of apogee of 1,200 kilometers. Find the period of the orbit
find the speed of the test charge when it reaches the center of the square.
Florence, who weighs 120 lbs, stands on a bathroom scale in an elevator. What would the scale read when the elevator is accelerating downward at 2m/s2.
When a bow and arrow are cocked, a force is applied to the string to pull it back. Is the energy of the system increased? Explain
q1. a vertical spring with a spring constant of 370 nm is mounted on the floor. from directly above the spring which is
What is an electric field between the plates? Towards which plate is it directed.
A uniform round tube of diameter 6.32 cm has two piston tops which are balanced at exactly the same height due to a mass m on the left side, what is the pressure at the bottom of the oil filled tube if the height of the pistons is initially 27.9 cm ..
After the reorganization, Barbara owns 25% of Acme's stock. Barbara has an adjusted basis of $400,000 in her Fisher stock. Barbara's basis for her Acme securities is?
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