Question

An airplane accelerates down a runway at $3.2m{s}^{-2}$ for 32.8 s until it finally lifts off the ground. Determine the distance travelled before takeoff.

• A. 1323 m
• B. 1527 m
• C. 1721 m
• D. 1931 m

Answer 1

The correct option is C 1721 m

Given,

$u=0m/sa=3.2m/s^{-2}t=32.8ss=?$

From equation of motion

$s=ut+\frac{1}{2}a{t}^2$

$s=0+\frac{1}{2}\times 3.2\times {32.8}^2=1721.34m$