gravity and friction

Question 1

the force that attracts a body toward the center of the earth, or toward any other physical body having mass.

Answer 1

gravity

Question 2

a large body of matter with no definite shape.

Answer 2

mass

Question 3

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

Answer 3

friction

Question 4

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 4

weight

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

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

Answer 6

balance

Question 7

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

Answer 7

force

Question 8

the SI unit of force.

Answer 8

newton

Question 9

the degree of compactness of a substance.

Answer 9

density