Question

A plane has a takeoff speed of 120m/s and requires 2400 m to reach that speed. Determine the acceleration of the plane and the time required to reach this speed?

• A. a = 4, t = 30
• B. a = 3, t = 30
• C. a = 4, t = 40
• D. a = 3, t = 40

Answer 1

The correct option is D

a = 3, t = 40

v² = u² + 2as

(120)² = 0 + 2*a*2400 =>a = 3 m/s²

v = u + at

120 = 0 + 3*t =>t = 40s