Question

1. give examples of newtons three laws from the skydiving picture?

newtons 1st law is shown by
newtons 2nd law is shown by
newtons 3rd law is shown by

Explanation:

• Newton's 1st Law (Inertia): Before the parachute opens, the skydiver is in free - fall, moving at a constant velocity (or accelerating due to gravity) until the parachute provides an unbalanced force. Or, when the skydiver is falling, if there were no air resistance (ideal case), they would continue moving at a constant velocity (but in reality, air resistance and gravity act). A better example: The skydiver continues to fall (or move) until the parachute deploys and provides a force to change their motion. When the skydiver is in free - fall initially, they maintain their state of motion (falling) until the parachute opens, which is a force that changes their state.
• Newton's 2nd Law (\(F = ma\)): The acceleration of the skydiver depends on the net force acting on them. When the parachute is closed, the net force is \(F_{net}=mg - F_{air}\) (where \(mg\) is weight and \(F_{air}\) is air resistance). When the parachute opens, the air resistance increases, so the net force decreases, and thus the acceleration decreases. For example, the skydiver's rate of change of velocity (acceleration) is determined by the net force. If the skydiver has a mass \(m\), and the net force is \(F\), then \(a=\frac{F}{m}\). When the parachute opens, the upward force (air resistance) increases, so the net downward force decreases, leading to a decrease in acceleration (slowing down).
• Newton's 3rd Law (Action - Reaction): The skydiver exerts a force on the air (pushing it downwards), and the air exerts an upward force (air resistance) on the skydiver. Also, when the parachute is deployed, the parachute pushes the air down, and the air pushes the parachute (and thus the skydiver) up. Another example: The force of gravity on the skydiver (Earth pulling the skydiver down) has an equal and opposite force of the skydiver pulling the Earth up, but the more relevant one for skydiving is the interaction between the skydiver/parachute and the air. The skydiver pushes the air molecules down as they fall, and the air molecules push the skydiver (and parachute) up with an equal force.

Answer:

s (Examples):

• Newton's 1st law is shown by: the skydiver continuing to fall (maintaining motion) until the parachute opens (a force to change motion).
• Newton's 2nd law is shown by: the skydiver's acceleration changing when the parachute opens (as net force changes, since \(a=\frac{F_{net}}{m}\)).
• Newton's 3rd law is shown by: the skydiver pushing air down (action), and air pushing the skydiver (and parachute) up (reaction).

(Note: These are example answers. There can be other valid examples based on the specific skydiving picture, but the above are general examples based on skydiving physics.)