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Q. A 56.0 kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.44 x 10^2 m/s from the top of a cliff 126m above level ground, where the ground is taken to be y = 0.
(a) What is the initial total mechanical energy of the projectile?
(b) Suppose the projectile is travelling 102.10 m/s at its maximum height of y = 342m. How much work has been done on the projectile by air friction?
(c) What is the speed of projectile immediately before it hits the ground if air friction does one and a half times as much work on projectile when it is going down as it did when it was going up?
AIlya and Anya each can run at the speed of 8.20 and walk at a speed of 4.00. They set off together on a route of length 5. 0. Anya walks half of the distance and runs the other half, while AIlya walks half of the time and runs the other half.
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The driver of an 1800 {kg} car travelling on a horizontal road at 100 kmh suddenly applies the brakes. Because of a slippery pavement, the friction of the road on the tires of the car, which is what slows down the car, is 20.0 percent of the weight o..
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A diver is planning to salvage a Spanish galleon located in 200 feet of water. He plans to use a diving suit that will be supplied with air from a hose. Calculate which compressor should be bought by the diver for the given condition
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Therefore of his observations, Ole Roemer concluded that eclipses of Io by Jupiter were delayed by 22 min throughout a six-month period as the Earth moved from the point in its orbit where it is closest to Jupiter to the diametrically opposite point ..
Now the gymnast (not holding any additional mass) walks directly above right support. What is the force the left support exerts on beam.
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