Question

1) A car is traveling at a steady 77km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.3m/s2 .

a)How much time elapses before the motorcycle is moving as fast as the car?

b)How far is the motorcycle from the car when it reaches this speed?

2)A gannet is a seabird that fishes by diving from a great height.

If a gannet hits the water at 32m/s , what height did it dive from? Assume that the gannet was motionless before starting its dive.

3)The takeoff speed for an Airbus A320 jetliner is77m/s . Velocity data measured during takeoff are as follows:

t(s)	vx(m/s)
0	0
10	21
20	42
30	63

a)What is the jetliner's acceleration during takeoff, in m/s2?

b)What is the jetliner's acceleration during takeoff, in g's?

c)At what time do the wheels leave the ground?

d)For safety reasons, in case of an aborted takeoff, the length of the runway must be three times the takeoff distance. What is the minimum length runway this aircraft can use?

Answer 1

Answer 2

Answer 3

Answer 4