Problem 1.4 A small helicopter is trying to land on a barge in the ocean. The propeller delivers an upward force of 36 000 N and the helicopter is observed to be descending at a constant safe speed of 3 m/s when it is 100 m above the barge. But suddenly there is a malfunction and the upward force is reduced to 30 000 N. (a) What is the mass of the helicopter? (b) What is the acceleration of the helicopter after the malfunction? (c) Assume this acceleration is maintained constant during the final descent. What is the speed of the helicopter when it contacts the barge?

Problem 1.4 A small helicopter is trying to land on a barge in the ocean. The propeller delivers an upward force of 36 000 N and the helicopter is observed to be descending at a constant safe speed of 3 m/s when it is 100 m above the barge. But suddenly there is a malfunction and the upward force is reduced to 30 000 N. (a) What is the mass of the helicopter? (b) What is the acceleration of the helicopter after the malfunction? (c) Assume this acceleration is maintained constant during the final descent. What is the speed of the helicopter when it contacts the barge?