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# Newton's First Law of Motion (Grade 8)

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## Newton's First Law of Motion

1.
According to Newton's first law of motion, a mass in motion remains in motion unless acted upon by some force.
1. True
2. False
2.
Heavy objects have more inertia than light objects.
1. True
2. False
3.
The first law of motion states
1. that an object at rest will remain at rest.
2. that an object in motion will remain in motion.
3. that an unbalanced force can change the velocity of an object.
4. all of the above.
4.
The tendency of an object to resist change in motion is called
1. inertia.
2. force.
3. gravity.
4. weight.
5.
Because of inertia, an object tends to move                          .
1. toward a larger object
2. in a curved path
3. away from a larger object
4. in a straight path
6.
Why is Newton's first law sometimes called the law of inertia?
1. Inertia is the tendency of objects to resist changes to their motion.
2. Inertia describes the application of force to an object at rest.
3. Inertia describes the applications of force to an object in motion.
4. Inertia is the same thing as friction.
7.
A magician suddenly jerks a tablecloth out from under the dishes on a table. This best demonstrates
1. an action-reaction pair of forces.
2. that the dishes have inertia.
3. that gravity tends to hold the dishes securely.
4. that the dishes have no acceleration.
8.
An object is subjected to an unbalanced force. What happens to the object?
1. The object remains in its place.
2. The object continues moving at constant speed.
3. The object changes its speed or direction.
4. Nothing happens to the motion of the object.
9.
Inertia is most closely tied to what property of matter?
1. mass
2. volume
3. gravity
4. normal force
5. pressure
10.
Earth rotates west to east. According to Newton's first law of motion, which should occur if you jumped straight up?
1. you land east of where you jumped from
2. you land west of where you jumped from
3. you land in the same place you jumped from
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