A skier starts at the top of a 23.7-meter hill. Assuming there is no friction and no air resistance, what is her speed (in m/s) at the bottom of the hill? 21.56
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- An 69 kg man runs up stairs and reaches 10 mheight for 14 s. what is his power? Use g = 9.8 m/s2 Calculate answer to one decimal.A 1.50 ✕ 103-kg car starts from rest and accelerates uniformly to 19.9 m/s in 12.7 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. ___hpA skier starts at the top of a frictionless slope and pushes off with a speed of 3.0 m/s. The elevation of the slope is 40 m. She skis down the slope to a valley with elevation 0.0 m and then glides to the peak of an adjacent slope that is at an elevation of 25 m. Calculate her speed at the second peak
- At the Earth's surface, a projectile is launched straight up at a speed of 7.5 km/s. To what height will it rise? Ignore air resistance. 8.12e+06 X Your response differs from the correct answer by more than 10%. Double check your calculations. mA block slides across the ground and comes to rest in 12.0 m. muk = 0.200. Find the initial speed using conservation of E. Correct answer: 6.86 m/sNeglecting friction and air resistance, a car with an initial velocity of 43.1 km/h coasts up a hill and comes to stop at the hill's top. What must be the height of the hill (in meters)? Hint: you do not need the car's mass to solve this problem, but if interested to solve the problem using kinetic and potential energies you can use a mass of 2000kg for the car.