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A 32.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 24.00 m. When she is partway down the slide, at a height h2 of 15.00 m, she is moving at a speed of 8.80 m/s.
Compute the mechanical energy lost due to friction
A 50000-kg railroad freight car collides with a stationary caboose car. They couple together, and 31 percent of the initial kinetic energy is dissipated as heat, sound, vibrations, etc. What is the mass of the caboose?
A particle of charge Q is fixed at the origin of anxy coordinate system. At t = 0 a particle(m = 0.776 g, q = 5.04 µC is located on thex axis at x = 18.7 cm, moving with a speed of39.8 m/s in the positive y direction.
A conducting spherical shell of inner radius b and outer radius c is concentric with a small metal sphere of radius a
q1. in a science fiction story a microscopic black hole is given an enormous positive charge by firing an
Two charged objects experience a mutual repulsive force of 0.71 N. If the charge of one of the objects is reduced by half and the distance separating the objects is quadrupled, what is the new force? (Enter the magnitude of the force.)
A material has a dielectric constant of εr=3.0 andhas an atomic density of 1028 atoms per cubic meter. If only two electrons in the outer orbital shell will distort with anapplied E-field, and both electrons follow the same orbital path asa pair,
A lamp hangs vertically from a cord in a descending elevator that decelerates at 3.2 m/s2. If the tension in the cord is 84 Newton, find what is the lamp mass
Suppose there are two transformers between your house and the high-voltage transmission line that distributes the power. In addition, assume that your house is the only one using electric power. At a substation the primary of a step-down transform..
Slamming on the brakes, a driver decelerates her car from 25.0 m/s to 15 m/s in 3.5 s. Find her average speed assuming the acceleration was unifrom.
A daredevil plans to bungee jump from a balloon 72.0 m above a carnival midway. He will use a uniform elastic cord, What length of cord should he use
A 1400kg weather rocket accelerates upward at 10m/s^ 2 . It explodes 2.5s after liftoff and breaks into two fragments, What was the direction of the heavier fragment
a 0.75-kg mass moving with a speed of 5.0 ms encounters a 0.25-kg mass moving in the opposite direction with speed 5.0
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