passwella.
Menu

JAMB Physics 1993 Question 5

Question 5

Motion

An aeroplane lands on a runway at a speed of 180 km h−1 and is brought to a stop uniformly in 30 seconds. What distance does it cover on the runway before coming to rest?

  1. A.360m
  2. B.540m
  3. C.750m
  4. D.957m
Show the answer and explanation

Answer: C (750m)

Explanation

180 km h−1 = 50 m s−1. With uniform slowing, average speed = 25 m s−1, so distance = 25 × 30 = 750 m.