Question

question 1: as the skater goes back and forth from one side of the ramp to the other, how do newtons laws of force explain the skateboarders movement? answer:

Explanation:

1. Newton's First Law (Inertia): The skater tends to stay in motion (or rest) unless a net force acts. On the ramp, gravity and normal force change his state.
2. Newton's Second Law (\(F = ma\)): The net force (gravity component along ramp) causes acceleration. As the skater moves up/down, the net force (and thus acceleration) changes direction, slowing him on the way up (deceleration) and speeding him on the way down (acceleration).
3. Newton's Third Law: The skater exerts a force on the ramp, and the ramp exerts an equal - opposite force on the skater, enabling movement (e.g., pushing off the ramp to start or maintain motion). Also, friction (a force pair) opposes motion, causing energy loss (slowing over time if no external force to compensate).

Answer:

• Newton’s First Law: The skateboarder’s motion is affected by inertia. When moving, he resists changes in motion (e.g., tends to keep moving). On the ramp, forces like gravity and the ramp’s normal force act to change his velocity (direction/speed).
• Newton’s Second Law (\(\boldsymbol{F = ma}\)): The net force (e.g., component of gravity along the ramp) causes acceleration. Going up the ramp, the net force opposes motion (deceleration, speed decreases). Going down, the net force aids motion (acceleration, speed increases).
• Newton’s Third Law: The skateboarder and ramp exert equal - opposite forces (e.g., when pushing off the ramp, or due to friction). Friction (a force pair) also opposes motion, leading to energy loss (slowing the skateboarder over multiple trips unless he applies force to compensate).