Chapter 10 Forces

Question 1

Force

Answer 1

A push or pull

Question 2

Newton

Answer 2

The SI unit of a force

Question 3

Net Force

Answer 3

The combination of all forces acting on an object

Question 4

Unbalanced Forces

Answer 4

Cause an object to start moving, stop moving, or change direction

Result in a net force and cause a change in the object’s motion

Question 5

Balanced Forces

Answer 5

Equal forces acting on one object in opposite directions

Each force is balanced by the other

Question 6

Friction

Answer 6

The force that two surfaces exert on each other when they rub against each other

Question 7

Static Friction

Answer 7

The friction that acts on objects that are not moving

Question 8

Sliding Friction

Answer 8

Occurs when two solid surfaces slide over each other

Question 9

Rolling Friction

Answer 9

Occurs when an objects rolls over a surface

Question 10

Fluid Friction

Answer 10

Occurs when a solid object moves through a fluid

Question 11

Gravity

Answer 11

A force that pulls objects toward each other

Question 12

Mass

Answer 12

A measure of the amount of matter in an object

Question 13

Weight

Answer 13

The measure of the force of gravity on an object at the surface of a planet

Question 14

Free Fall

Answer 14

Occurs when the only force acting on an object is gravity

Question 15

Air Resistance

Answer 15

The type of friction that objects experience when they fall through air

Question 16

Terminal Velocity

Answer 16

The greatest velocity a falling object reaches

Question 17

Projectile

Answer 17

An object that is thrown

Question 18

Inertia

Answer 18

The tendency of an object to resist a change in motion

Question 19

Momentum

Answer 19

A characteristic of a moving object that is related to the mass and the velocity of the object

Question 20

Law of Conservation of Momentum

Answer 20

In the absence of outside forces, the total momentum of objects that interact does not change