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An ice skater is traveling in a straight, horizontal line on the ice with a velocity of v=5.5m/s in the positive x direction. The coefficient of kinetic friction between the skates and the ice is u_k=.19.
a.) Write an expression for the normal force, F_n, that the ice pushes against both skates together. Assume the skater's mass is m.
b.) Using the expression for normal force, write an expression for the skater's acceleration in the x direction, a.
c.) How long, t_h in seconds, will it take for the skater's velocity to drop by half?
d.) How far, d_h in meters will the skater travel during the time t_h?
A person who is nearsighted has a far point of do = 4.8 m. Write an expression for the focal length of the glasses which will allow her to see distant objects clearly
A ball and bat, approaching one another each with the same speed of 1.3 m/s collide. Find the speed of the ball after the collision
What is the magnitude of the force of upper leg on the lower leg at the knee joint.
Intense white light is incident on a diffraction grating that has 720 lines/mm. What is the angular separation between the violet edge (400 nm) and the red edge (700 nm) of the first order spectrum produced by the grating
A person lifts a 5kg cement block a vertical distance of 2.3m and after that aeries the block horizontally a distance of 6m. Determine the work completed by the person and by the force of gravity in this process.
Capacitance and resistance network.
A block of mass m = 331 g is dragged with a string across a rough horizontal table. The string tension is T = 3.27 N, What is the power supplied by the force of friction
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A circular coil 17.0cm in diameter and containing nine loops lies flat on the ground. The Earth's magnetic field at this location has magnitude 5.50×10?5T, Determine the torque on the coil
A light bulb is connected to a 260V potential, and produces 120-Watts of light and heat. What is the resistance of the wire in the light bulb and how much current does it sends through the heart
A small sphere with a charge of -5.9 10-7 C is placed in a uniform electric field of magnitude 1.9 106 N/C pointing to the west. What is the magnitude and direction of the force on the sphere due to the electric field?
A steel beam that is 5 m long weighs 320N. It rests on two supports, 3.00 m apart, with same amounts of the beam extending from each end. Suki, who weighs 525N, stands on the beam in the center and then walks toward one end. How close to the end c..
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