A hovering rescue helicopter has a container of supplies, with a weight of 1 960 N, hanging from a cable. The tension in the cable is 2 100 N.
3.1 State Newton’s First Law of Motion in words. (2)
3.2 Draw a labelled force-diagram of ALL the forces acting on the container. (3)
3.3 Why does the container remain stationary despite the tension being greater than the weight? (2)
Now the winch inside the helicopter starts to pull the container upwards with an acceleration of 0,13 m.s-2, while the helicopter remains in its position.
3.4 Calculate the mass of the container. (2)
3.5 Calculate the magnitude of the tension in the cable while the container is being pulled upwards. (4)
After an acceleration of a few metres the container is pulled up at a constant velocity of 0,8 m.s-1.
3.6 What will be the magnitude of the tension in the cable while the container moves upwards at a constant velocity? (1)