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A student drags his 22-kg suitcase through the airport at a constant speed. The trolley strap of the suitcase forms an angle of 50 ° above the horizontal. (a) If the friction force between the suitcase and the ground is 75 N, what force is the student exerting? (b) What is the coefficient of friction?
A 120-V motor has mechanical power output of 3.20 hp. It is 91.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A ball of mass 0.1 kg is suspended by a string 30 cm long. Keeping the string always taut, the ball describes a horizontal circle of radius 15 cm. Calculate the angular speed of the ball.
The buoy is made from two homogeneous cones each having radius r. Find the distance zc to the buoy's center of gravity G.
How much work is done by pressure in forcing 6.6 m3 of water through a 13.0 mm internal diameter pipe if the difference in pressure at the two ends of the pipe is 1.0 atm
Andrew jumped on a rocket, sending it straight up, and timing its motion. He sees that the rocket goes by the top of the library after .40 seconds, How fast was the rocket going at lauch
Two charges, one is - 84 nC and other is 2 x 84 nC are separated by 2 meter distance. Obtain the electric field at the midpoint of the line joining the charges
A zero-friction (air bearing) cart is launched at a speed of 1.85 m/s up a slightly inclined track. How far does the cart travel from launch until the time it comes to rest
A temperature controller, designed to work in a steam environment, involves a bimetaillic strip constructed of brass and steel,connected at their ends by rivets. Each of the metals is 2.0mm thick.
As a result of the friction of tides, the earth rotates more slowly as time progresses. What is the torque(N*m) acting on the earth
A package of mass 7 kg sits at the equator of an airless asteroid of mass 7.0 x 1020 kg and radius 8.9 x 105 m. How much must we compress the spring
When a current flows in an aluminum wire of diameter 4.51 mm, the drift speed of the conduction electrons is 1.85 × 10-4 m/s. What is the electron current in the wire
A ball is thrown straight upwards from the roof of a tall building. The building is 60.0 m high. find the velocity of the ball right before it hits the ground
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