Question

3. A jumbo jet taxiing down the runway receives word that it must return to the gate to pick up an important

Answer 1

Answer:

$-9 m/s^2$

Explanation:

Acceleration is defined as the ratio between the change in velocity and the time taken for the velocity to change. Mathematically:

$a=\frac{v-u}{t}$

where

v is the final velocity

u is the initial velocity

t is the time interval

In this problem, we know the following data:

$u=45.0 m/s$ is the initial velocity of the plane

$v=0$ is the final velocity (the plane comes to a stop)

$t=5.00 s$ is the time interval

Substituting into the equation, we find

$a=\frac{0-45}{5}=-9 m/s^2$

and the negative sign means the acceleration is opposite to the direction of motion of the plane.