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"A 200 lb man jumps out of a window into a fire net 30 ft below. The net stretches 6 ft vertically before bring in the man to rest and tossing him back into the air. The maximum potential energy in (ft lb) of the net is:”
A skier traveling 11.2 m/s reaches the foot of a steady upward 15.8° incline and glides 10.9 m up along this slope before coming to rest
The block starts at the top of the wedge at 1.2 m. Find out the final speeds of a block and the wedge once the blook has slid to the bottom.
Two springs having spring constants k1 and k2 are attached end-to-end (in series). Describe the effective spring constant of the whole system
Susan's 10.0kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30° above the floor. The tension is a constant 32.0N and the coefficient of friction is 0.170. Use work and energy to find Paul's s..
A photon is emitted when a hydrogen atom undergoes a transitionfrom the n = 5 state to the n = 3 state. Calculate the energy (in electron volts) of the emitted photon
A slide projector needs to create a 99.0 -high image of a 2.00 -tall slide. The screen is 290 from the slide. What focal length does the lens need? Assume that it is a thin lens.
The total charge that an automobile battery can supply without being recharged is given in terms of Ampere-hours. If each of the two headlights draws 1.7 A , find out the time before your battery is "dead"
An object is placed 10.0\; cm in front of an unknown type of mirror that produces an erect image that is 3.11 times larger than the original object. What is the focal length of the mirror
A 50 kg child takes a ride on a roller coast . the coaster maintains a constant speed of15 m/s as it moves around a loop of radius 10m. what is the centrupetal acceleration of the child
A vertical solid steel post of diameter d = 24cm and length L = 2.10m is required to support a load of mass m = 8200kg. What is the strain in the post
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 5.5× 104 kg, and the force causes its speed to change from 7300 to 5700m/s.
In a Young's double-slit experiment, the wavelength of the light utilized is 515 nm (in vacuum), and the separation among the slits is 3.00*10-6m.
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