A jetliner, traveling northward, is landing with a speed of 72 m/s. Once the jet touches down, it has 730 m of runway in which to reduce its speed to 5.9 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to be northward).

Answer 1

The acceleration (a) must be southward to slow the plane down. An equation you can use is:

2 a X = [V2^2 - V1^2]

where V2 = 5.9 m/s and V1 = 72 m/s

Solve for a. It will be negative (meaning the opposite or northward)

Answer 2

t=0