Newton, Gravity, 1st & 2nd Laws of Motion
In what kind of terms did Newton express his laws?
mathematical
The tendency of an object to resist a change in its motion is called ________.
inertia
A proposed answer to a problem based on known facts that are used as a basis for further experimentation is a/an ___________.
hypothesis
Centripetal force is a/an ____________ force.
inward
What do scientists call the distance to the right or left of the pendulum's normal hanging position?
displacement
The _______________ is the point in an object where there is as much weight on one side as on the other side. This is also called the center of balance.
center of gravity
What is the formula to calculate force?
F = ma
Newton's cradle is a tool that is used to demonstrate Newton's ___ law.
third
An object's ______________ determines whether it sinks or floats.
density
The word centripetal means ___.
toward the center
We know that every object exerts an attraction on every other object, and the greater the mass of the object, the _______ the attraction.
stronger
Astronauts on the International Space Station (ISS) float because they are weightless, even though their _______ is the same as when they are on Earth.
mass
What would be considered a demonstration of static friction?
when two surfaces are pressing together but are not moving
What one change in a pendulum changes the time to complete a swing?
length of string/rope (pendulum length)
Whether something floats or sinks depends on its ______________ , not it's ___________________ .
density not weight
What force keeps the planets in their orbit?
gravity
Whether an object feels heavy or light is an indication of its ____.
weight
Which surface will produce the least amount of friction?
smooth glass tabletop
tiled shower stall
grassy soccer field
gravel running track
smooth glass tabletop
Which of these is an example of centripetal force?
street drag racing
puzzle pieces in a line
surfing a tidal wave
electrons around a nucleus
electrons around a nucleus
What scientist was the first to experiment with pendulums?
Galileo
What did Newton use to get his laws out to other scientists and the general public?
a book
Newton's first law of motion states that an object at rest will remain ______________ and an object in motion will remain in motion unless acted upon by a(n) ________________ force.
rest
outside
A substance that can be applied to a surface that reduces friction is called a ___.
lubricant
Liquids and _________ are considered to be fluids.
gases
Who used the pendulum to create the grandfather clock?
Christiaan Huygens
Which law is it?
A golfer hits a ping pong ball and a golf ball. The ping pong ball flies 10 feet and the golf ball flies 50 yards.
second law
While sitting on the couch, you are pushing down on it and it is pushing up on you. Which of Newton's laws of motion is this demonstrating?
third law of motion
If an astronaut knocks a wrench off the outside of the space shuttle (while in space) while she is doing a repair job, the wrench will continue moving in the same direction. Which of Newton's laws of motion will the wrench demonstrate?
first law of motion
Galileo concluded that planets that are closer to the Sun orbit ________ than those farther out.
faster
A ship is less likely to sink from the amount of cargo it is carrying when it is in the ocean rather than a lake because the ocean has __________ in the water.
sodium chloride