An airplane flies east at a speed of 120 m/s. the airplane has a mass of 3200 kg.

a. what is the momentum of the airplane? (remember, momentum is a vector quantity)

b. air resistance reduces the speed of the plane is 110 m/s. what impulse was applied to the plane by the air resistance?

PART A)

Initial momentum of the airplane is product of its initial speed and mass

so here it is

m = 3200 kg

v = 120 m/s

now we have

Part B)

Speed of the plane is decreases to 110 m/s due to air resistance

so it's final momentum is given as

here we have

Now impulse is defined as change in momentum

So impulse on airplane is given as