LUOA's - Physical Science - 8th Grade
What 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.
2nd Law
Which law is it? A baseball hit with with a wooden bat flies further than a baseball hit with a plastic bat
2nd Law
Which law is it? You hit a ping pong ball and a tennis ball with a tennis racket. The ping pong ball will travel farther.
2nd Law
How many lifeboats should have been on the Titanic so that all 2000 people could have gotten into one?
31
Which law is it? a space shuttle propels gas particles out of the back of the shuttle and is able to travel forward through space.
3rd Law
While sitting on the couch, I am pushing down on it and it is pushing up on me. Which of Newton's laws of motion is this demonstrating?
3rd law of motion
How much force is needed to accelerate a 38 kg block at 1.2 m/s2?
45.6 N
Who used the pendulum to create the grandfather clock?
Christian Huygens
What do scientists call the distance to the right or left of the pendulum's normal hanging position?
Displacment
What is the formula to calculate force?
F=ma
Galileo concluded that planets that are closer to the sun orbit ________ than those further out.
Faster
The Titanic was advertised to be an unsinkable ship because of its newly designed hall that had 16 ___________ compartments to prevent it from sinking.
Watertight
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
Without the force of gravity, an object pushed into space would ______.
continue to move forward
What one change in a pendulum changes the time to complete a swing?
length of string/rope (pendulum length)
A substance that can be applied to a surface that reduces the friction is called a ___.
lubricant
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
The amount of matter in an object is called the ____.
mass
According to Newton's 2nd law, the acceleration of an object depends on the __________ of an object and the _________________ .
mass and amount of object
In what kind of terms did Newton express his laws?
mathematical
An object with less mass will accelerate with _________ speed than an object with more mass when acted upon by the same amount of force.
more
A fish maintains _______________buoyancy by inflating an internal bladder with_____________________ .
neutral and air
Which surface will produce the least amount of friction?
smooth glass tabletop
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
What keeps a cruise ship that weighs over 50,000 tons from sinking in the ocean?
the ship's density
What effect does doubling the length of the string of a pendulum have on its swing?
the swing is slowed down
What effect does doubling the mass of the bob on the end of a pendulum have on its swing?
there is no effect
In the Olympic sport of curling, the curlers put drops of _____ on the ice to make the stone glide further.
water
Whether an object feels heavy or light is an indication of its ____.
weight
Another way of stating Archimedes' Principle is the ___________of the displaced liquid equals the ___________________ of the floating object.
weight and weight
What force pulls an object flying through the air to the ground?
gravity
The larger an object is the _____ attraction it exerts on other objects.
greater
A proposed answer to a problem based on known facts that are used as a basis for further experimentation is a(n) ___________.
hypothesis
The tendency of an object to resist a change in its motion is called ________.
inertia
Centripetal force is an ____________ force.
inward
What happens to the pressure in water as an object gets deeper?
it increases
Thinking about the formula for density (Density = Mass / Volume), if the Titanic were to increase in mass without increasing in size, what would happen to its density?
its density would increase
What would be considered a demonstration of static friction?
When two surfaces are pressing together but are not moving
How much force is needed to accelerate a 29 kg block at 5.8 m/s2?
168.2 N
Which law is it? A basketball continues to roll until it hits something.
1st Law
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?
1st law of motion
A ball rolls across the floor and it does not stop until it hits the wall; which of Newton's Laws of Motion does this demonstrate?
First Law of Motion
What scientist was the first to experiment with pendulums?
Galileo
According to the lesson on Centripetal Force, which sport can use the study of this force to help you excel?
Golf
What force keeps the planets in their orbit?
gravity
What evangelist aboard the Titanic continued to share the Good news of Christ while the ship was sinking?
John Harper
Centripetal force demonstrates which of Newton's laws of motion?
Newton's first law.
Newton realized that the gravitational pull of ______________the and _______________the affect the ocean tides on earth.
Sun and moon
What was Galileo's conclusion after thinking about this problem?
The heavier ball would hit the ground first.
What did Newton use to get his laws out to other scientists and the general public?
a book
What motion was Galileo watching when he became intrigued with the pendulum?
a chandelier swinging
The rate of change of velocity is called _______.
acceleration
If you apply the same force to items with different mass, they will accelerate at [answer] speeds.
different
Which of these is an example of centripetal force?
electrons around a nucleus
According to the Law of Inertia, an object at rest will stay (remain) at rest unless acted upon by a(n) ____.
force
What causes a flat piece of paper to land on the ground after the paper that was crumpled up?
friction
Liquids and _________ are considered to be fluids.
gases
What was the first standard metric unit of mass?
grams
