A small aircraft has a lift-off od 35m/s. What minimum acceleration is needed to

Question

A small aircraft has a lift-off od 35m/s. What minimum acceleration is needed to be airborne in 210 m?

A)need the time on the runway.
B) 5.8m/s^2
C)1.9m/s^2
D)2.9m/s^2
E)2.0m/s^2
If all force come in equal and opposite pairs why is there ever any acceleration?
A) The opposing forces act on different objects
B)Field forces are responsible for acceleration
C)Contact forces are responsible for acceleration
D) The opposing forces might be of different types
E) The opposing forces need to be aligned
So-called field forces are forces that
A)Have no known origin
B)Are not reproducible in the laboratory
C) Act at a distance with no apparent contact
D) Act only in 2 dimensional plane

Explanation / Answer

1) B) 5.8 m/s^2

we know, radial acceleration, a_rad = v^2/R

= 35^2/210

= 5.83 m/s^2

2) A) The opposing forces act on different objects

3) A)Have no known origin

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