In order to simulate weightlessness for astronauts in training they are flown in
ID: 1389216 • Letter: I
Question
In order to simulate weightlessness for astronauts in training they are flown in a vertical circle. If the passengers are to experience wrightlessness, how fast should an airplane be moving at the top of a vertical circle with a radius of 2.50 km ? An object falling near the surface of the earth has a constant acceleration of 9.8 m/s2. If the object starts from rest, this means that the Newton concluded that some force had to act on the moon in its circular path around the earth because In a perfectly elastic collision, which of the following is not conserved (circle all that apply)? In a perfectly inelastic collision, which of the following is not conserved (circle all that apply)?Explanation / Answer
1)Part(b) is the right answer.
Because.
Weightlessness is felt when the acceleration of a body equal to the gravitational acceleration.
In our case, Its given that, R = 2.5 km = 2500meters
We know that condition for weighlessness is,
V = sqrt (g R) = sqrt(9.81 x 2500) = 156.6 which nearly equals = 157 m/s
Hence V = 157 m/s ; Option (b) is the correct answer.
(2)Part(c) is the answer.
(3)Part(b) is the correct answer.
Because, A necessary centripial force has to be there, in order to keep the moon moving in its circular orbit.
(4)Part(c) Velocity is the answer.
In an elastic collision, All the energy and momentum of the bosy is conserved, but what changes is it velocity.
(5)Part(d) and (e) are correct answer.
In a perfectly ineastic collision, the KE of system is not conserved.
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