Question

name class date
determine if the following statements are true or false.

1. inertia is the tendency of an object to resist motion.
2. newtons first law of motion is also called the law of acceleration.
3. if an object is at rest, inertia will keep it at rest.
4. the inertia of an object is determined by its speed.
5. the speed of an object changes only when it is acted on by an unbalanced force.
6. a stationary object resists movement only because of gravity.
7. the tendency of an object to resist a change in motion depends on its mass.
8. if the net force acting on an object is zero, its inertia is also zero.
9. when you are moving at a high rate of speed, inertia makes is hard to stop.
10. newtons first law of motion applies only to objects that are already moving.

read this passage from the text and answer the questions that follow.
action and reaction
newtons third law of motion states that every action has an equal and opposite reaction. this means that forces always act in pairs. first an action occurs, such as two skateboarders pushing together. then a reaction occurs that is equal in strength to the action but in the opposite direction. in the case of the skateboarders, they move apart, and the distance they move depends on how hard they first pushed together.
you might think that actions and reactions would cancel each other out like balanced forces do. balanced forces, which are also equal and opposite, cancel out because they act on the same object. action and reaction forces, in contrast, act on different objects, so they dont cancel out. in fact, they often result in motion.

1. what is newtons third law of motion?
2. describe an example of an action and reaction that result in motion.
3. compare and contrast action - reaction forces and balanced forces.

Explanation:

1. Inertia is the tendency of an object to resist a change in its state of motion (not just resist motion). So statement 1 is false.
2. Newton's first law of motion is called the law of inertia, and the second law is the law of acceleration. So statement 2 is false.
3. According to Newton's first law (law of inertia), if an object is at rest, it will stay at rest unless acted on by an unbalanced force. So statement 3 is true.
4. The inertia of an object is determined by its mass, not speed. So statement 4 is false.
5. According to Newton's first law, an object's speed changes only when an unbalanced force acts on it. So statement 5 is true.
6. A stationary object resists movement because of inertia, not just gravity. So statement 6 is false.
7. The tendency of an object to resist a change in motion (inertia) depends on its mass. So statement 7 is true.
8. Inertia is a property of an object related to its mass. It is not zero when the net force is zero. So statement 8 is false.
9. When moving at high speed, inertia (the tendency to keep moving) makes it hard to stop. So statement 9 is true.
10. Newton's first law applies to all objects, whether at rest or in motion. So statement 10 is false.

For the passage - related questions:

1. Newton's third law of motion states that every action has an equal and opposite reaction. Forces act in pairs.
2. For example, when a rocket expels gas (action), the gas exerts a force on the rocket (reaction), and the rocket moves (motion).
3. Both action - reaction and balanced forces are equal and opposite. But balanced forces act on the same object and cancel out; action - reaction forces act on different objects and often result in motion.

Answer:

1. False
2. False
3. True
4. False
5. True
6. False
7. True
8. False
9. True
10. False

1. Newton's third law of motion states that every action has an equal and opposite reaction. Forces act in pairs.
2. For example, when a rocket expels gas (action), the gas exerts a force on the rocket (reaction), and the rocket moves (motion).
3. Both action - reaction and balanced forces are equal and opposite. But balanced forces act on the same object and cancel out; action - reaction forces act on different objects and often result in motion.