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An old oaken bucket of mass 6.75 kg hangs in a well at the end of a rope. The rope passes over a frictionless pulley at the top of the well, and you pull horizontally on the end of the rope to raise the bucket slowly a distance of 4.00 m
How much work do you do on the bucket in pulling it up?
How much work does gravity do on the bucket?
Tell me why the total net work done on the bucket is equal to zero?
Two steel wires of the same length, one with radius r and the other with radius 4r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move
An objects average density, p, is defined as the ration of its mass to its volume: p = M/V. The Earth's mass is 5.94x10^24 kg and its volume is 1.08x10^12 km^3
A proton accelerates from rest in a uniform electric field of 690 N/C. At one later moment, its speed is 1.30 Mm/s, What is its kinetic energy at the end of this interval
A fully loaded, slow-moving freight elevator has a cab with a total mass of 1150 kg, which is required to travel upward 49 m in 3.1 min, starting and ending at rest. The elevator's counterweight has a mass of only 1025 kg, and so the elevator motor m..
An automobile having a mass of 1750 kg is placed on a hydraulic lift in a garage. The piston lifting the car is 0.235 m in diameter. What is the force exerted on the small piston
Young’s double slit experiment is performed with blue-green light of wavelength 500 nm. The slits are 1.20 mm apart, and the viewing screen is 5.40 m from the slits. How far apart are two adjacent bright fringes? What is the angular separation of two..
Calculate the magnitude of the gravitational force exerted on a 429-kg satellite that is a distance of 2.91 times earth radii from the center of the earth. What is the magnitude of the earth's acceleration
A laser emits a narrow beam of light. The radius of the beam is 3.9 mm, and the power is 3.6 mW. What is the intensity of the laser beam
You have determine that it takes 3s for a toy car ti travel through the distance of 162 cm. calculate the average speed of the toy car
A simple pendulum consists of a small object of mass m (the "bob") suspended by a cord of length l of negligible mass. A force F is applied in the horizontal direction (so F is Fi), Determine the work done by the gravitational force on the bob
The springs of a 1500kg car compress 5.00mm when its 68 kg driver gets into the driver seat. A 100 kg passenger then gets into the car. Find the total compression of the spring
An airplane must reach a speed of 189mi/h to take off. If the runway is 472m long, what is the minimum value of acceleration that will allow the airplane to take off successfully.
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