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A rock of 350 kg is found at the top of a mountain that is 1250-m high. Find the potential energy with respect to the bottom of the mountain (g = 9.8 m/s2)
A 1200 kg car pushes a 2200 kg truck that has a dead battery . When the driver stes on he accelerator, What is the magnitude of the force of the car on the truck
A ring is fitted loosely (with no friction) around a long, smooth rod of length L = 0.51 m. Determine the radial velocity of the ring
Consider two equal and opposite torques acting on a rotating object. The angular momentum of the object is:
A boy of mass 60.0 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.0 m above the net. What is the average force on the net due to the boy during the interval
A hockey puck slides off the edge of a table with an initial velocity of 20.0 m/s. The height of the table above the ground is 2.00 meter. Determine how far from the edge of the table
An electron (charge -e) is projected horizontally into the space between two oppositely charged parallel plates. The electric field between the plates is 462N/C upward.
Energy is produced by the sun by nuclear fusion reactions in which matter is converted into energy. We can gauge that the Sun produces energy at the rate of 3.80×1026 W. How many tons of matter does the Sun lose each second?
A 75 kg skier skis down a 20 degree slope. There is frictional force of 115 N and air resistance of 85 N. What is the resultant force working on the skier?
A generator connected to an RLC circuit circuit has an rms voltage of 120 V and an rms current of 34 mA. what is the inductive reactance of the circuit
In a photoelectric effect experiment, no current flows unless thewavelength is less than 570nm. What is the work function of themetal?
One mole of an ideal gas does 2 600 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm, Determine the initial volume of the gas
Find the time taken until the ball hits the ground. Find velocity of the ball when it hits the ground. If the ball had been projected at 10 ms-1 instead of 30 ms-1, what would its final velocity when it hits the ground have been?
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