Lesson 2 pg. 24-38

Question 1

The force that attracts a body toward the center of the earth, or toward any other physical body having mass. For most purposes Newton’s laws of gravity apply, with minor modifications to take the general theory of relativity into account.

Answer 1

Gravity

Question 2

A body’s relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.

Answer 2

Weight

Question 3

The resistance that one surface or object encounters when moving over another.

Answer 3

Friction

Question 4

A coherent, typically large body of matter with no definite shape.

Answer 4

Mass

Question 5

The curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.

Answer 5

Orbit

Question 6

The SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second, and is equivalent to 100,000 dynes.

Answer 6

Newton

Question 7

A spring scale or spring balance or newton meter is a type of weighing scale. … It works by Hooke’s Law, which states that the force needed to extend a spring is proportional to the distance that spring is extended from its rest position. Therefore, the scale markings on the spring balance are equally spaced.

Answer 7

Spring Scale

Question 8

An even distribution of weight enabling someone or something to remain upright and steady.

Answer 8

Balance

Question 9

strength or energy as an attribute of physical action or movement.

Answer 9

Force

Question 10

the speed of something in a given direction.

Answer 10

Velocity

Question 11

a vehicle’s capacity to gain speed within a short time.

Answer 11

Acceleration