A rescue helicopter drops a heavy survival canister from a height of 48 m48\text{ m}48 m. The canister hits the snowy ground below after 4.0 s4.0\text{ s}4.0 s. Calculate the average speed of the canister as it falls. Use the equation: distance travelled=average speed×time\text{distance travelled} = \text{average speed} \times \text{time}distance travelled=average speed×time
The crew draws a free body force diagram for the canister as it falls through the air:
Identify the two forces represented by labels P and Q.
Explain the motion of the canister as it falls, referring to these forces.
A marine rescue boat has a mass of 8500 kg8500\text{ kg}8500 kg. Calculate the force needed to accelerate the boat at 1.6 m/s21.6\text{ m/s}^21.6 m/s2 across the water. Use the equation: force=mass×acceleration\text{force} = \text{mass} \times \text{acceleration}force=mass×acceleration