Deck 14: Astronomical Motion: Inertia, Mass, and Force

Question 1

A body at rest that stays at rest exhibits the concept of ____________.

A) acceleration
B) velocity
C) force
D) inertia

Answer 1

inertia

Question 2

Newton's first law is best expressed as ___________.

A) F=ma
B) for every action there is a reaction
C) a body that maintains the same velocity unless forces act on it
D) force of gravity

Answer 2

a body that maintains the same velocity unless forces act on it

Question 3

The standard measurement of mass is __________.

A) gram
B) kilogram
C) ounce
D) pound

Answer 3

kilogram

Question 4

A mass is being moved in a circle by a string. If the string breaks the mass will initially move

A) away from the center of the circle.
B) along the curve of the circle, just as it was doing before the string broke.
C) in a straight line in the direction that it was moving when the string broke.
D) toward the center of the circle.

Question 5

___________ is how much gravity acts on a mass.

Question 6

_____________ is what changes a body's velocity.

Question 7

Galileo used the concept of inertia in his laws of motion.