Question

ii. inertia
a. definition: the tendency of an object to _____ changes in motion.
b. relationship between mass and inertia:

• greater mass = _____ inertia
• smaller mass = _____ inertia

c. example: which is easier to stop, a ___ or a ___ moving at the same speed?
iii. balanced vs. unbalanced forces
a. balanced forces:

• net force = _____
• result: _____ change in object’s motion or position

Explanation:

These are fill-in-the-blank questions based on basic physics concepts (Newton's laws, inertia, and balanced/unbalanced forces).

1. For Section II (Inertia):

• Inertia is the resistance of any physical object to any change in its velocity.
• Inertia is directly proportional to an object's mass: more mass means more inertia, less mass means less inertia.
• An object with less inertia (smaller mass) is easier to stop at the same speed.

1. For Section III (Balanced vs. Unbalanced Forces):

• Balanced forces are equal in magnitude and opposite in direction, so their net force is zero, and they do not change an object's motion.

Answer:

II. Inertia

A. Definition: The tendency of an object to resist changes in motion.
B. Relationship between mass and inertia:

• Greater mass = greater inertia
• Smaller mass = less inertia

C. Example: Which is easier to stop, a small car or a large truck moving at the same speed? (Note: Any pair of objects where the first has smaller mass than the second is acceptable; small car/large truck is a common example)

III. Balanced vs. Unbalanced Forces

A. Balanced forces:

• Net force = $0$
• Result: no change in the object's motion or position