Question

Birds have evolved to the ability to control their motions through the air by controlling the forces exerted on their bodies by the air; the contact forces on a bird by the air plus the force of gravity on the bird by the Earth determine the change in motion of the bird at any instant of time. In this problem, you will be asked to use what you know about acceleration to track the motion of a diving hawk.

A hawk is flying horizontally Southward at an altitude of 144.0 m and at a speed of 1.60 m/s when he spots a slow-flying finch ahead of his current location and below his current path. At time zero, the hawk starts a dive by controlling the contact forces on him by the air so as to produce an acceleration of 3.90 m/s2 in a direction 80.0 degrees below horizontally Southward for a time of 1.250 seconds.

What is the hawk's final velocity at the end of the 1.250-s interval?

Give your answer as an ordered pair, with magnitude first, followed by a comma, then followed by the direction. Give the direction in terms of an angle measured below the horizontally Southward direction.

View Available Hint(s)

magnitude, direction	nothing	m/s, degrees below South

Submit

Part B

What is the hawk's displacement during the 1.250-s interval?

Give your answer as an ordered pair, with magnitude first, followed by a comma, then followed by the direction. Give the direction in terms of an angle measured below the horizontally Southward direction.

View Available Hint(s)

magnitude, direction =	nothing	m, degrees below South

Answer 1