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A man pulls a toboggan for a distance of 40.0 meter along the snow with a rope directed 20.0 degree above the snow. The tension in the rope is 90.0 Newton.
(a) Find how much work is done on the toboggan by the tension force?
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(b) Find how much work is done if the same tension is directed parallel to the snow?
a cooling fan is turned off when it is running at 900revmin . it turns 800 revolutions before it comes to a stop. what
A doubly charged ion is accelerated to an energy of 30.0 keV by the electric field between two parallel conducting plates separated by 1.50 cm
When the power is turned off on a turntable spinning at 78.0 rpm , you find that it takes 10.5 revolutions for it to stop while slowing down at a uniform rate. How long does it take to stop after the power is turned off
A bullet with a mas of 10 g and an initial velocity of 800m/s penetrates 5 cm into a fixed block of wood before stopping. The average force on the buller by the wood is? A block of mass 4.25 kg hanging from a light string is struck by a projectile of..
Three point charges areplaced on the x-axis. Charge 1 is located at x = a and has a chargeof +5q, charge 2 is at x = 3a and has a charge of +3q, charge 3 is at x = 5a andhas a charge of +5q. A fourth charge is located on the y-axis at (0,a) and ha..
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530nm, What is the work function of this material
What is the friction force that acts on the firefighter. find Max wavelength and Min wavelength.
a bowling ball has a mass of 7.2 kg and radius of 0.11m. a billiard ball has a mass of 0.38 kg and a radius of 0.028 m.
The center of a 1.40km diameter spherical pocket of oil is 1.5 km beneath the Earth's surface.Estimate by what percentage directly above the pocket of oil would differ from expected value of g for a uniform Earth? Assume the density of oil is 8.0 ..
How long does it take for the top to complete first five revolutions? The string is long enough that it is wrapped around the top more than five turns.
A ceiling fan is turned on and a net torque of 1.9 N·m is applied to the blades. The bladeshave a total moment of inertia of 0.24kg·m2. What is the angular acceleration of the blades?
q1. horse races once around a circular track in a time of 176 s with a speed of 26 ms. what is the radius of the
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