Obtain the final angular speed
An electric circular saw is designed to reach its final angular speed, starting from rest, in 1.40 s. Its average angular acceleration is 325 rad/s2. Obtain its final angular speed.
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A horizontal wire that is 4.4 m long is exposed to a uniform external magnetic field of magnitude 79 mT (millitesla). The external field is directed at an angle of 39o below the horizontal.
Determine the velocity of the cart just after firing. During the firing, the man remains at the same position on the cart. Neglect rolling resistance of the cart.
An RCL series circuit has a 18-ohm resistor, a 0.050-H inductor, and a 1.5x10-4 F capacitor. The generator has an rms voltage of 240 volts. What is the rms current in the circuit when the generator is set to 30.0 Hz?
Determine the speed of the block just after the impact. Also, what distance does slide up the plane before it momentarily stops? The coefficient of kinetic friction between the block and the plane is u=.4.
During braking, the angular displacement of each wheel is +13.0 revolutions. (a) How much time does it take for the bike to come to rest?
One diver runs off the edge of the cliff, tucks into a "ball," and rotates on the way down with an average angular speed of 1.4 rev/s. Ignore air resistance and determine the number of revolutions she makes while on the way down.
In 9.5 s a fisherman winds 2.1 m of fishing line onto a reel whose radius is 3.0 cm (assumed to be constant as an approximation). The line is being reeled in at a constant speed. Determine the angular speed of the reel.
A 0.073 kg arrow is fired horizontally. The bowstring exerts an average force of 75 N on the arrow over a distance of 0.90 m. With what speed does the arrow leave the bow?
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