Define what acceleration means.
State Newton’s first law of motion in your own words.
Fig. 1.1 shows the way the vertical speed $v$ of a parachutist dropping from an aircraft changes with time $t$.
Calculate the distance covered by the parachutist during the first $3.0\,\text{s}$ of motion.
Explain how the resultant force acting on the parachutist varies from $t = 0$ (point A) to $t = 15\,\text{s}$ (point C).
Describe the changes in the frictional force on the parachutist at $t = 15\,\text{s}$ (point C).
Describe how the frictional force on the parachutist changes between $t = 15\,\text{s}$ (point C) and $t = 22\,\text{s}$ (point E).
The mass of the parachutist is $95\,\text{kg}$. Calculate the average acceleration for the parachutist from $t = 15\,\text{s}$ (point C) to $t = 17\,\text{s}$ (point D).
The mass of the parachutist is $95\,\text{kg}$. Calculate the average frictional force for the parachutist from $t = 15\,\text{s}$ (point C) to $t = 17\,\text{s}$ (point D).