In order to simulate weightlessness for astronauts in training, they are flown in a vertical circle. If the passengers are to experience weightlessness, how fast should an airplane be moving at the top of a vertical circle with a radius of 2.5 km?
A) 79 m/s
B) 310 m/s
C) 260 m/s
D) 160 m/s
E) 510 m/s
D
You might also like to view...
Uncertainty Principle Using Momentum and Position: A tiny dust particle of mass 8.50 µg is being observed under a microscope. Its position is determined to be within a space of 0.0060 mm. (h = 6.626 × 10-34 J ? s)(a) Find the uncertainty in its speed implied by the uncertainty in its position.(b) Assuming the dust particle is moving at the speed in part (a), how many years would it take for the particle to move 1.0 mm?
What will be an ideal response?
A stone thrown horizontally from a cliff with an initial speed of 10 m/s hits the bottom of the cliff in 4.3 s. What is the height of the cliff?
A. 22 m B. 43 m C. 69 m D. 91 m
A 20-cm length of wire is held along an east-west direction and moved horizontally to the north with a speed of 3.0 m/s in a region where the magnetic field of the earth is 60 ?T directed 30° below the horizontal. What is the magnitude of the potential difference between the ends of the wire?
A. 36 ?V B. 18 ?V C. 31 ?V D. 24 ?V E. 21 ?V
Resistance and Resistivity: Which one of the following quantities is equivalent to 1 ??
A. 1 J/s B. 1 W/A C. 1 V ? A D. 1 V/A E. 1 A ? s