Chapter 13:

Question 1

Forces interacting with matter

Answer 1

Dynamics

Question 2

Push or pull; acts in a single direction with a certain size or magnitude

Answer 2

Force

Question 3

A vector quantity and is labeled with a bold face F.

Answer 3

Force

Question 4

SI unit is Newton and is always outside of an object.

Answer 4

Force

Question 5

One newton of force is the amount of push or pull needed to accelerate a ______ object at 1m/s2.

Answer 5

1kg

Question 6

Force between systems that acts only when one system touches another.

Answer 6

Contact force

Question 7

Pushes together

Answer 7

Compression

Question 8

Pulls away

Answer 8

Tension

Question 9

Slide (scissors)

Answer 9

Slide

Question 10

Force that acts between objects that are not touching

Answer 10

Field force

Question 11

Examples of field forces:

Answer 11

• Gravity
• Magnetic
• Electric

Question 12

Occurs when one force is larger than the rest; actis in the direction of the larger force; results in a change in motion

Answer 12

Unbalance force

Question 13

Occurs when multiple, simultaneous forces have pushes and pull that cancel each other out; results in a (net) force of zero

Answer 13

Balanced Force

Question 14

Objects continue their motion unlesss an external, unbalanced force acts on them

Answer 14

Galileo

Question 15

Tendency of matter to resist change in its motion inertia

Answer 15

Kepler

Question 16

Newton’s 1st Law: The Law of Inertia

Answer 16

• Objects at rest remain at rest
• Objects in motion continue in that motion
• Only an external, unbalance force can change motion
• The force can be any kind
• Balanced forces leave an object’s motion unchanged.
• An object acted on by unbalanced forces changes speed, direction, or both.

Question 17

Newton’s 1st Law: The Law of Inertia

Answer 17

• We cannot measure inertia directly
• We measure it indirectly by measuring the mass of the object
• If not net force acts on an object, the object is at equilibrium