Chapter 2: Forces

Question 0

Newton

Answer 0

A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second

Question 1

Force

Answer 1

A push or pull exerted on an object.

Question 2

Net force

Answer 2

The overall force on an object when all the individual forces acting on it are added together.

Question 3

Friction

Answer 3

1. The force that two surfaces exert on each other when they rub against each other. 2. The transfer of electrons from one uncharged object to another uncharged object by rubbing.

Question 4

Sliding friction

Answer 4

Friction that occurs when one solid surface slides over another.

Question 5

Static friction

Answer 5

Friction that acts between objects that are not moving

Question 6

Fluid friction

Answer 6

Friction that occurs as an object moves through a fluid.

Question 7

Rolling friction

Answer 7

Friction that occurs when an object rolls over a surface.

Question 8

Gravity

Answer 8

The attractive force between objects; the force that moves objects downhill.

Question 9

Mass

Answer 9

The amount of matter in an object.

Question 10

Weight

Answer 10

A measure of the force of gravity acting on an object.

Question 11

Inertia

Answer 11

The tendency of an object to resist a change in motion.

Question 12

Momentum

Answer 12

The product of an object’s mass and velocity.

Question 13

Free fall

Answer 13

The motion of a falling object when the only force acting on it is gravity.

Question 14

Satellite

Answer 14

Any object that orbits around another object in space.

Question 15

Centripetal force

Answer 15

A force that causes an object to move in a circle.

Question 16

Law of conservation of momentum

Answer 16

The rule that in the absence of outside forces the total momentum of objects that interact does not change.