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A 60 kg skier leaves the end of a ski-jump ramp with a velocity of 24 m/s directed 25 degrees above the horizontal. Suppose that as a result of air drag the skier returns to the ground with a speed of 22 m/s, landing 14 m vertically below the end of the ramp. From the launch to the return to the ground, by how much is the mechanical energy of the skier-Earth system reduced because of air drag?
In April 2010, the worst oil spill until that time occurred when an explosion and fire on the Deepwater Horizon left 11 workers dead and began releasing oil into the Gulf of Mexico.
You're an optometrist, mounting a projector at the back of your 4.2m -long exam room, 2.6 m above the floor. At what height should you center the pattern on the wall
a 12 kg ball is dropped from rest at a point 5m above the floor and bounces back with a speed of 6 ms. what impulse is
Acceleration is sometimes expressed as multiples of g, the acceleration due to Earth’s gravity. In a car crash, the car’s (and driver’s) velocity may go from 26 m/s to zero in 0.15 seconds. On average, what is the acceleration experienced by the driv..
A car makes a trip due north for three-fourths of the time and duesouth one-fourth of the time. The average northward velocity has amagnitude of 33 m/s, and the averagesouthward velocity has a magnitude of 20 m/s. What is the average velocity (magnit..
At a rock concert a dB meter registers 115 dB at a distance of 1.50 m from the stage, how far from the stage would you need to be to hear the concert at 90 dB
The width of the ribbon normal to a radius vector originationg at the star's center is much greater than the thickness of the ribbon in the radial direction.
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 30 degree angle from the horizontal, at what initial speed must he throw the ball so that it goes through the basket without striking the back..
A rope hangs from a cylinder over which it is wound, of radius 0.20 m and mass 40.0 kg, What torque does the hanging mass exert on the cylinder
A 0.12kg rubber ball is dropped from a height of 1.0m above the floor and it bounces back to a height of 0.80m, How much energy is lost
A one loop circuit is connected thus: A 3.0 V source, with the + side connected to a 10 ohm resistor, how much power does the bulb dissipate
A 500 kg cart is at the top of a steep track. It rolls from rest down a 7 meter hill. How much potential energy does it have at the top of the hill
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