With what speed does the arrow leave the bow
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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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.
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.
The coefficient of performance is COPH = 15. Determine TL for the low-temperature heat reservoir and the work required to operate the heat pump, W.
A skier slides horizontally along the snow for a distance of 12 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is µk = 0.080. Initially, how fast was the skier going?
The maximum torsional stress is 12 ksi, and the maximum shear stress is 10 ksi. What is the von Mises stress for a point on the upper surface of the bar?
Relative to the ground, what is the gravitational potential energy of a 62.0 kg person who is at the top of the Sears Tower, a height of 443 m above the ground?
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