A jet plane lands with a speed of 87 m/s and can accelerate at a maximum rate of - 4.10 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest?

Question

Physics

Mateo Roy

20 September, 05:10

A jet plane lands with a speed of 87 m/s and can accelerate at a maximum rate of - 4.10 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest?

+1

Answers (1)

Know the Answer?

Clinton Forbes · Answer 1

21.22s

Explanation:

initial velocity u=87m/s

acceleration a=-4.10 m/s²

velocity v=0

time t=?

From Newton's first law of motion

V=u+at

0=87-4.10t

-87=-4.1t

t = - 87/-4.1

t = 21.22 s