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A disk of mass M and radius R is initially at rest. It is acted upon by a constant torque N for a time t. Determine the final angular velocity of the disk and the work required to spin it up to this final state. If the energy was supplied by a motor, what was the minumum power rating of the motor?
A pump is required to lift a mass of 770 kg of water per minute from a well of depth 14.2 m and eject it with a speed of 17.5 m/s. How much kinetic energy does the pump give the ejected water
A small mailbag is released from a helicopter that is descending steadily at 1.75 m/s. After 5.00 s, what is the speed of the mailbag
At a point P, the path lengths from two point sound wave sources have a difference of 1/4 l. What is the phase difference between the sound waves at poiunt P
A person weighing 119 pounds can run up 500 steps, How much power did the person expend running up the steps
A race car starting from rest accelerates at a constant rate of 6.50 m/s2. What is the velocity of the car
If a simple pendulum of mass 1.059kg and length 9.99cm is moving at 101 cm/s as it passes through the low point of its arc, What is the tension in the string of the pendulum
Imagine that plane reaches the necessary takeoff velocity
A 2100 kg car traveling to the right at 32m/s is chasing a second car of the same mass that is traveling to the right at 10m/s.
A mass of 0.5 kg is attached to a massless spring with a spring constnt of k = 600 N/m. What was the incident speed of the second mass
What is Lagrangian for the system
A car takes 9 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
Suppose you were to disconnnect the battery (without losing any of the charge on the plates) and then remove the dielectric medium. What would be the new voltage across the plates
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