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To start a mower, a person must pull on a string attached to a pulley with a force of 70N. The pulley is a disc of mass 0.1kg and radius 0.1m. Consider the pull to act tangent to the pulley at the edge of the pulley. Calculate the angular acceleration of the pulley and the rotation rate if the torque remains constant for 2s.
A constant, uniform magnetic field directed into this sheet exists in the region to the right of the y axis. Calculate the radius of the particles path
A 731 kg car moving at 29 m/s brakes to a stop. The brakes contain about 13 kg of iron that absorb the energy. What is increase in temperature of the brakes
A point source of light is located at the bottom of a steel tank, and an opaque circular card of radius 5.7 cm is placed over it. What is the index of refraction of the fluid
The speed of a bobsled is increasing because it has an acceleration of 2.4 m/s2. find the magnitude of the net force that acts on the bobsled
Light inside an optical fiber tube hits the wall between the tube and air and is totally internally reflected. what is the index of refraction of the tube
Jack was exposed to fast neutrons; he received a radiation dose of 300rem on part of his hand, affecting 28.0grams of tissue. How much radiation did Jack receive
What volume of space contains an energy equal. A car in stop-and-go traffic starts at rest, moves forward 12m in 8 seconds, then comes to rest again. The velocity-versus-time plot for this car is given.
A relatively small puncture is made at the base of a large, open-topped water reservoir that sits on the ground, determine the water level in the tank
A 19.5 ?F capacitor is fully charged by connecting it to a 14.0 V battery. Calculate the charge stored on one of the capacitor plates
A uniform solid sphere of radius 0.503 m and mass 15.7 kg turns counter clockwise (when viewed from above) about the vertical axis through its center. Find its vector angular momentum when its angular speed is 3.08 rad/s. Wouldn't you use the formula..
Inertia and torque of the rotating bodies.
q1. a 1000 kg car travelling at a speed of 20 ms skids to a halt on wet concrete where fk 0.50. how long is the cars
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