as a speed of
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- In a time of T seconds, a motorcycle can accelerate from rest to the speed v. (a) Determine the amount of time (in terms of T) required for it to accelerate from v to 9v if the power output remains constant. Δt = Can you obtain an expression relating the power required for the change in speed to the change in kinetic energy and the time required for the change in speed? (b) Determine the speed of the motorcycle (in terms of v) 8T after starting. vf =An object is launched vertically downward at a speed of 30 m/s from a height of 3 km. What is its height when its velocity is 40 m/s? (Use conservation of mechanical energy)On an alien planet, a rock dropped from 4 m above the ground moves at 8 m/s when it lands on the ground. What is g?
- A 0.1 kg apple hits the ground with a speed of 17 m/s. From what height was the apple dropped? I am not sure which equation would be used to solved this problem - it is physics and this was the entire question given.An object of mass 8 kg falls form the top of a building 84 m high. What is its kinetic energy (in joules) when it has fallen by 36 m.A 60 kg skier pushes off the top of the frictionless hill at an initial speed of 4 m/s. Hot fats will age be moving after dropping 10 m in elevation? Air resistance is negligible.
- A roller coaster is moving at 6 m/s at the top of the first hill (h= 56 m). Ignoring friction and air resistance, how fast will the roller coaster be moving at the top of a subsequent hill, which is 24 m?An object is dropped from a height of 18 m. At what height will its kinetic energy and its potential energy be equal?When the speed of an object doubles, does its kinetic energy double? Explain your
- A 10 kg object is released at the top of a building 100 m high, If the force of air resistance is on the object is 30 N. Its speed just before strikes the grouna ts 100m O 55 m/s O 50 m's O 37.42 m/s O 30 m/sA tumbleweed rolls off a 120m high cliff with a speed of 23.6 m/s. What would the final velocity of the tumbleweed before striking the ground be if there were no air resistance?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.