Question

A jet lands on a aircraft carrier at 55 mile (9m/s).
(a)what is its acceleration if it stops in 7 sec.
(b)what is the displacement of the plane which it is stopping.

Answer 1

a)

$$a=\frac{v}{t}=\frac{9}{7}=1.3\frac{m}{s^2}$$

b)

$$s=0.5at^2=0.5vt$$

$$s=0.5(9)(7)=31.5\ m$$