Constant Acceleration Kinematics: An airplane needs to reach a forward velocity of 203.0 km/h to take off. On a 2000-m runway, what is the minimum uniform acceleration necessary for the plane to take flight if it starts from rest?
A. 0.79 m/s2
B. 0.87 m/s2
C. 0.95 m/s2
D. 1.0 m/s2
Answer: A
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A.A B.B C.C D.D E. Toward the viewer F. Away from the viewer T. The field is zero.
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Answer the following statement true (T) or false (F)
The Moon is in the habitable zone of the Sun at the same distance as the Earth but is not habitable. How can this be?
A) the Moon did have water on its surface in the past, but it was destroyed by high-energy particles from the Sun B) the Moon has never had water on its surface at any time C) the Moon is too small to retain an atmosphere necessary for liquid water to be stable D) the Moon did have water on its surface in the past, but it was blasted off the surface by impacts
An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of 15 m/s2. How much time does it take for the complete increase in speed?
A) 0.25 s B) 4.0 s C) 0.0577 s D) 17.3 s E) 8.0 s