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Q1. A 37-kg girl is bouncing on a trampoline. All through a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 215 J from 430 J. How high does she rise during this interval? Avoid air resistance.
Q2. A car rests on the slanted ramp leading into car-transporter trailer. The car's brakes and transmissions locks are released; only the cable attached to the car and to the frame of the trailer prevents car from rolling backward off the ramp. If the car's weight is w, find out the tension in the cable and the force with which the ramp pushes on the car tires.
The car's motion can be divided into three different stages: its motion before the driver realizes he's late, its motion after the driver hits the gas (but before he sees the police car), and its motion after the driver sees the police car. Which of ..
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A radio station broadcasts at a frequency of 600,000 Hz. Know that radio waves have a speed of 3.00 x 10^8m/s, what is wavelength of these waves.
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A small ball of mass 62 g is suspended from a string of length 37 cm and whirled in a circle lying in the horizontal plane. If the string makes an angle of 33? with the perpendicular, find the centripetal force experienced by the ball. The accelerati..
Suppose a uniformly charged (with a linear charge density) wire starts at point 0 and rises vertically along the positive axis to a length. Determine the x-component of the electric field at point. That is, compute near one end of a long wire, in the..
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