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A 200 lb metal object is suspended in a liquid with a specific gravity of 1.6. The metal object has a weight density of 150 lb/ft^3.
A woman runs up a flight of stairs. The gain in her gravitational potential energy is U. If she runs up the same stairs with twice the speed.
A 100 kg object is pulled upwards 5.0 meters by a rope with an acceleration of 1.0 m/s^2. Find the work done by the tension force in the rope.
In an atwoods machine experiment, the larger mass is 1.8kg and the smaller mass is 1.2kg. Ignoring friction what is the acceleration of the masses.
(a) What is the momentum of a 1.20 x 10^4 kg garbage truck moving at 30.0 m/s? (b) At what speed would an 8.00 kg trash can have the same momentum?
How many revolutions do the tires make, neglecting any backing up and any change in the radius due to wear?
A water well has an 8-inch diameter and is 175 feet deep. Assume that water enters the well at a rate of 4 gallons per minute.
Energy is conventionally measured in Calories as well as in joules. One Calorie in nutrition is one kilocalorie, defined as 1 kcal = 4186 J.
The work done by a conservative force on a particle is equal to the increase of the corresponding potential energy of the particle.
If the speed of the cycle at the bottom of the hill is 10ms(-1) what is the kinetic energy of the cycle+rider?
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s/s. Through what angle has the wheel turned when its angular speed.
What will be the maximum kinetic energy (in eV) with which this same radiation ejects electrons from another metal whose work function is 2.01 eV?
Under what conditions would kinetic energy not be conserved? Explain each response and back up your response using principles of physics.
If Ms. takes a running start so that she is moving at 2.40 m/s at the bottom of the ramp, what is her speed when she reaches the top of the incline?
Process 1 requires 600 joules added, process 2 requires 200 J added. What is the change in internal energy as a result of the first two processes?
Explain this in some detail with some pictures/diagrams to show and explain the TTT diagram concept
A 50-kg sled is pulled 20 meters over ice at a constant speed. The coefficient of friction between the sled and the ice is 0.13.
2 forces parallel to the X axis do 14.7 Joules of work on a small tray while moving it 20.7 meters in the X direction across a gym floor.
A little red wagon with a mass of 4.60 kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of 10.0m/s.
Two point charges are arranged along the x axis as shown the figure. At which of the following values of x is the electric potential equal to zero?
A block with a mass m is pulled along a horizontal surface for a distance +x by a constant force F at an angle theta with respect to the horizontal.
A 230 N sphere 0.20 m in radius rolls, without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal.
"Energy can be converted to one form or another, but cannot be created or destroyed." This the theory of:
How much work is required, using an ideal Carnot refrigerator, to change 0.500 kg of tap water at 10.0°C into ice at -20.0°C?
How far would the box have slid if the friction coefficient didn't increase, but instead had the constant value of 0.100?