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Consider the work done by gravity and a spring:
a) Discover an expression for the work done by gravity on a mass m as it is raised a distance h vertically.
b) A spring with constant k is horizontal (ignore gravity) and starts out compressed a distance x. Discover work done by the spring on a mass m when the spring is released and moves back to its equilibrium position (x=0)
c) Discover the work done by the spring on the mass m if the mass starts out at the springs equilibrium (x=0) and compresses the spring a distance of x
d) Discover the work done by the spring on the mass m if the mass starts out at the spring equilibrium (x=0) and compresses the spring a distance x
Assume you are 65.00 cm from a plane mirror. What area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 5.0 mm.
A 21.0 m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder of aluminum 3.50 cm in diameter. How far to the side does the top of the pole flex
a 2.9-kg cart is rolling along a frictionless horizontal track towards a 1.0-kg cart that is held initially at rest.
in a classical model of the hydrogen atom the electron movesaround the proton in a circular orbit of radius 0.053 nm.
At the bow of a ship on a stormy sea, a crewman conducts an experiment by standing on a bathroom scale. Find the maximum downward acceleration experienced by the crewman
A ball thrown straight up at an initial speed of 14.0m/s reaches a maximum height of 7.6m. What fraction of the ball's initial kinetic energy is dissipated by air resistance as the ball moves upward?
The energy given off by 300 grams of an alloy as it cools through 50 degrees Celcius raises the temperature of 300 grams of water from 30 degrees Celsius to 40 degrees Celcius.
Wax An air-filled parallel-plate capacitor has acapacitance of 1.4 pF. The separation ofthe plates is doubled and wax is inserted between them. The new capacitance is 2.8 pF. Find the dielectric constant of the wax.
A hill that has a 32.1% grade is one that rises 32.1 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal
The electric motor of a heat pump transfers energy as heat from the outdoors, which is at -7.4°C, to a room, which is at 15°C. If the heat pump were a Carnot heat pump (a Carnot engine working in reverse), how much energy would be transferred as heat..
given the indices of refraction and of material 1 and material 2 respectively rank these scenarios on the basis of the
A simple pendulum, 2.0 m in length, is released with a push when the support string is at an angle of 25° from the vertical. what is its speed at the bottom of the swing
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