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A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 23.0° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 55.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.150. Find the magnitude of the force that the tow bar exerts on the skier.
For a step-down transformer, the input voltage is 120V (rms) and output is to be 6v (rms). What should be the number of turns on the secondary side of the transformer, if the number of turns on the primary side is 200
A uniform spherical shell of mass 8.60kg with diameter 48 cm has four small masses of mass 2.00kg attached to its outer surface and equally spaced around it. This combination is spinning about an axis running through the center of the sphere and t..
The first controlled, sustained flight in a heavier-than-air craft was made by Orville Wright on December 17, 1903. Calculate the average velocity of the plane
an rc circuit is connected across a dc voltage source through an open switch. the switch is closed at t0s. which of the
A tourist drops a rock from rest from a guard rail overlooking a valley. What is the velocity of the rock at 4.0s? What is the displacement of the rock at 4.0s? Suppose the tourists threw the rock with an initial velocity of 8m/s down. determine the ..
A 75 N/m spring is suspended vertically with nothing attached to it and rests at equilibrium. Then a mass is attached to the spring and given a nudge. Determine the mass attached to the spring
A 170g mass attached to a horizontal spring oscillates at a frequency of 3.70Hz. Determine the maximum speed, the maximum acceleration, total energy, and position at t=3.40s.
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.00 m. What is the magnitude of its average acceleration during the contact with the floor
A shopper in a supermarket pushes a cart with a force of 37 N directed at an angle of 25° below the horizontal. What is the net work done on the cart
A flat observation screen is placed at a distance of 4.5 m from a pair of slits. The separation on the screen between the central bright fringe and the first-order bright fringe is 0.043 m. Determine the slit separation
A hypothetical diatomic molecule is composed of two identical atoms of mass 12 u. what is the rotational inertia
A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.00 atm at 20.0oC. how tall is the column of gas that is supporting the piston
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