Question

If a plane traveling down a runway at 75 m/s accelerates at a rate of 8 m/s’over

40 seconds, then what is its final velocity?

Answer 1

395 m/s

Step-by-step explanation:

• Initial velocity (u) = 75 m/s
• Acceleration (a) = 8 m/s²
• Time taken (t) = 40 seconds

By using the first equation of motion,

❖ v = u + at

• v denotes final velocity
• u denotes initial velocity
• a denotes acceleration
• t denotes time

→ v = 75 + 8(40)

→ v = 75 + 320

→ v = 395

→ Final velocity = 395 m/s