Physics, 17.12.2021 02:00 Alysssssssssssa
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 820-kg helicopter rises from rest to a speed of 11.0 m/s in a time of 4.5 s. During this time it climbs to a height of 7.2 m. What is the average power generated by the lifting force
Answers: 1
Physics, 22.06.2019 11:30
Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?
Answers: 3
Physics, 23.06.2019 00:00
A15,000 kg rocket traveling at +230 m/s turns on its engines. over a 6.0 s period it burns 1,000 kg of fuel. an observer on the ground measures the velocity of the expelled gases to be −1,200 m/s.
Answers: 3
Physics, 23.06.2019 02:30
If a car has a speed of 20 m/s, how long will it take to go 155 m? a. 3100 s b. 135 s c. 2.1 s d. 7.8 s
Answers: 1
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting f...
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