Question

name: carrie shulz date: 9/30/25 period: 3cp

1. define motion and explain how it is observed in everyday life.
2. how can you tell if an object is accelerating?
3. describe a situation where an object is moving but its speed is constant.
4. explain how a car can be accelerating even if its speed doesnt change.
5. what does a flat line on a distance - time graph represent?
6. how does friction affect the motion of a rolling ball?
7. describe the motion of a pendulum and explain what causes it to slow down.
8. how does gravity influence the motion of a falling object?
9. what is inertia and how does it relate to motion?
10. explain how newtons first law applies to a skateboarder coasting on a flat surface.
11. describe the motion of an object thrown straight up into the air.

Explanation:

1. Motion is a change in position of an object with respect to time. In daily - life, we see cars moving on roads, people walking, etc.
2. An object is accelerating if its velocity (speed and/or direction) is changing.
3. A car moving around a circular track at a steady speed is moving but its speed is constant while its direction is changing.
4. A car can be accelerating even if its speed doesn't change when it changes direction, since acceleration is a change in velocity and velocity includes direction.
5. A flat line on a distance - time graph represents an object at rest as there is no change in distance over time.
6. Friction slows down the motion of a rolling ball by acting in the opposite direction of its motion.
7. A pendulum swings back and forth in a periodic motion. Air resistance and friction at the pivot cause it to slow down.
8. Gravity causes a falling object to accelerate downwards towards the Earth's center at a rate of approximately 9.8 m/s² near the Earth's surface.
9. Inertia is the tendency of an object to resist changes in its state of motion. It is related to motion as more massive objects have more inertia and are harder to start, stop or change the motion of.
10. A skateboarder coasting on a flat surface will keep moving at a constant velocity according to Newton's First Law (an object in motion will stay in motion with a constant velocity unless acted upon by an external force), assuming no friction or air - resistance.
11. An object thrown straight up into the air first moves upwards with a decreasing velocity due to the downward pull of gravity. At its maximum height, its velocity is 0, and then it starts to fall downwards with an increasing velocity due to gravity.

Answer:

1. Motion is change in position with respect to time. Observed in daily objects like moving cars.
2. When its velocity (speed or direction) changes.
3. Car moving in a circular track at steady speed.
4. When it changes direction as acceleration is change in velocity.
5. Object at rest as no change in distance over time.
6. Slows it down by acting opposite to motion.
7. Swings back and forth; air resistance and pivot friction slow it.
8. Causes it to accelerate downwards at ~9.8 m/s² near Earth's surface.
9. Tendency to resist motion change; more mass, more inertia.
10. Keeps moving at constant velocity as per Newton's First Law (assuming no external forces).
11. Moves up with decreasing velocity, stops at max height then falls with increasing velocity.