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A figure skater performs a triple twisting jump. She rotates around her vertical axis three times while she was in the air. The time it takes to complete the jump from takeoff to landing is 0.8 seconds. What was the figure skater's average angular speed in twisting for this jump?
A device known as Atwood\'s machine consists of two masses hanging from the ends of a vertical rope that passes over a pulley. Assume the rope and pulley are massless and there is no friction in the pulley.
Suppose you pour water into a container until it reaches a depth of 12 cm, What is the pressure at the bottom of the container
A rock is tossed straight up with a velocity of 14 m/s When it returns, it falls into a hole 10m deep.
A rope applies a horizontal force of 180N to pull a crate a distance of 2m across the floor A frictional force of 60N opposes this motion.
A lighthouse that rises h1 = 43.6 ft above the surface of the water sits on a rocky cliff that extends $d$ = 20.0 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of lighthouse at an angle of $theta$ = 29...
Compute magnitude of the average emf
A small piece of dust of mass m = 1.2 g travels horizontally through an electric air cleaner in which the electric field is 472 N/C, What is the charge of the dust particle
An 8-g bullet is fired into a 170 g block that is initially at rest at the edge of a table of 1m height. The bullet remains in the block, and after the impact the block lands d = 2.10 m from the bottom of the table. Determine out the initial speed..
Write down an expression for the mass of the nucleus
Explain how much work does the gravitational force do on the block as the block travels from point P to (a) point Q and (b) the top of the loop?
A vertical tube open at the top contains 5.2 cm of oil (density 0.82 g/cm^3) floating on 5.2 cm of water. Find out the gauge pressure at the bottom of the tube.
An indestructible bullet 1.85 cm long is fired straight through a board that is 11.10 cm thick. The bullet strikes board with a speed of 455m/s and emerges with a speed of 279m/s. (To simplify, suppose that the bullet accelerates only while the fr..
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