Vocabulary
Newton put ideas about gravity together in the _____________.
a) law of universal gravitation
b) force
c) motion
d) inertia
law of universal gravitation
Newton developed ______ laws of motion.
a) 1
b) 5
c) 3
c) 3
To find the speed of an object, you need to know ____________ and time
a) motion
b) distance
c) acceleration
d) elapsed time
b) distance
The force of attraction between any two objects that have mass __________
a)gravity
b) motion
c) force
a)gravity
2. A change in position is called ___________.
a) force
b) motion
c) inertia
d) running
b) motion
Speed is the rate at which the _________ of an object changes.
a) direction
b) position
c) distance
b) position
The length of time that passes from one event to another is ___________.
a) average speed
b) constant speed
c) elapsed time
d) inertia
c) elapsed time
The gravitational force between two objects depends on the product of the ______ of the two objects.
a) mass
b) distance
c) speed
a) mass
A push or a pull is called _____________.
a) force
b) friction
c) motion
d) inertia
a) force
Velocity tells about the speed and _________ of a moving object.
a) distance
b) direction
c) speed
b) direction
If the results of calculation acceleration is a negative number, an object is ______
a) speeding up
b) moving at a constant speed
c) decelerating
d) moving uphill
c) decelerating
True or False: Sir Isaac Newton proposed three laws to explain motion.
True
When things slide or roll over each other, ___________, occurs.
a) motion
b) force
c) friction
c) friction
Deceleration is the rate of _________
a) speed
b) slowdown
c) motion
b) slowdown
The law that states that if no force acts on an object at rest, it will remain at rest is __________
a) Newton's first law of motion
b) Newtons second law of motion
c) Newtons third law of motion
a) Newton's first law of motion
The second law of motion says that the motion of force needed to produce a given change in the motion of an object depends on the __________ of the object.
a) mass
b) distance
c) friction
a) mass
5. The tendency to resist changes in motions is called _________________.
a) force
b) motion
c) inertia
c) inertia
Acceleration equals the change in velocity divided by the change in ________.
a) time
b) direction
c) distance
a) time
a) opposes
b) run
c) fly
a) opposes
The Third Law of Motion says that if an object exerts a force on a second object, the second object will always exert a _______ on the first object.
a) force
b) speed
c) velocity
a) force