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A 2-kg box is initially sliding at a speed of 15 m/s on a horizontal surface. Wind is applying a constant 5-N force at an angle 30 degrees down from the horizontal, in the opposite direction of the box's motion. The box comes to rest after traveling 20 m. What is the coefficient of kinetic friction between the box and the horizontal surface?
A .14kg baseball with an initial speed of 28m/s rebounds with a speed of 34m/s after being struck with a bat. What was the average force between ball and bat
A capacitor consists of two parallel plates, each with an area of 17.0cm2 , separated by a distance of 0.150cm. How much energy is stored in the charged capacitor
What is the frequency of up and down oscillations of the wheel? Regard wheel as a mass on one end of a spring and regard the body of the car as a fixed support for the other end of the spring.
A 4.67-kg ball of clay is thrown downward from a height of 2.77 m with a speed of 4.81 m/s onto a spring with k = 1450 N/m. Find the total work done on the clay during the spring's compression
A motor develops 0.75 kW of power at 2000 revs per 10 min. What torque is applied to the motor shaft
A cylindrical hoop and a spherical shell both roll without slipping and both have identical masses (6 kg) and identical radii (0.2 m). What is the velocity of each at the bottom of the hill
If the alternating current in a circuit is described by the equation I=20sin60t, what are the peak current and frequency
The company adheres to a 60% dividend payout ratio and has a P/E ratio of 19. There are 21,000 shares of stock outstanding. Illustrate what is the amount of the annual net income for the firm?
A bungee cord is stretched between two poles with a force of 415 N. What is the velocity of a wave on this bungee cord
A small block with a mass of 0.170 kg is attached to a cord passing through the hole in a frictionless, horizontal surface .The block is initially revolving at a distance of 0.50 m from the hole with a speed of 0.80 m/s. The cord is then pulled from ..
A girl is sledding down a slope that is inclined at 30º with respect to the horizontal, The combined mass of the girl and the sled is 76.5 kg, How much time is required for the sled to travel down a 149-m slope, starting from rest
A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill. The crest of the second hill is circular, What must be the height of the hill
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