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Total questions: 95
Worksheet time: 2hrs 23mins
If you tell someone that the swingset in this park is about 10 meters from the dead tree in the direction of the oak tree, which is the reference point?
the oak tree
the swingset
the dead tree
ten meters
Which of the following units indicates speed?
m
m/s
m/s2
s/m
Which best describes the velocity of a person on a merry-go-round?
zero
constant
increasing
continuously changing
Which is true of a third-base run?
The displacement is more than a first-base run and less than a second-base run, and the distance is more than a first-base run or a second-base run.
The displacement is the same as a first-base run and less than a second-base run, and the distance is more than a first-base or second-base run.
The displacement is the same as a first-base run and a second-base run, and the distance is more than a first-base run or second-base run.
The displacement is more than a first-base or second-base run, and the distance is the same as a first-base run and less than a second-base run.
What is acceleration?
change in velocity
change in speed
change in position
change in direction
18 m/s
23 m/s
27 m/s
30 m/s
A train pulls out of a station at a speed of 3 m/s. 45 s after leaving the station, the train is going 18 m/s. What is its acceleration?
0.33 m/s2
0.45 m/s2
0.57 m/s2
0.66 m/s2
0.7 m/s2
1.0 m/s2
1.3 m/s2
1.5 m/s2
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Weight is a force measured in...
Kilograms
Newtons
Grams
Which statments are true about GRAVITY?
Objects with a large mass are difficult to lift
It acts towards the centre of the Earth
It doesn't act on a flying aeroplane
It makes the Moon orbits the Earth
Which of these is not a force?
Weight
Upthrust
Mass
Where is your mass greater?
On the Moon
On Earth
It's the same on the Moon as on Earth
Choose the odd one out about GRAVITY:
Newtons
Towards the centre of the Earth
Pull force
Archimedes
Choose the odd one out about UPTHRUST:
Contact force
Opposite to gravity
Applied by water and air
Non-contact force
Choose the odd one out:
Push and pull force
Attract and repel
Magnetic field
Contact force
Pikachu's mass is 6 kg. His weight on Earth is 60N.
What's his weight on the Moon?
9,6 N
(because 6x1,6=9,6)
6 N
(because 60:10=6)
What happens when two forces are equal and opposite?
The forces are balanced
The object doesn't move
The forces are unbalanced
The object moves
What happens when a force in one direction is bigger than a force in the opposite direction?
The forces are balanced
The object doesn't move
The forces are unbalanced
The object moves
Tick the objects a magnet will attract:
a steel paperclip
an iron nail
a wooden pencil
the same pole of another magnet
Why does a rubber duck float?
Because the weight and the upthrust are the same
Because ducks always float
Because it has a big mass and a small volume
Which forces are acting on the skydiver?
Gravity
Upthrust
Magnetism
Balanced or Unbalanced?
Balanced
because the parachute slows down the fall
Unbalanced,
because the person is falling down
What is true about this photo?
The magnet creats a magnetic field
The iron filings show how the magnetic field is
Magnetism is a contact force
Magnets attract objects made of iron and steel.
Different poles of magnets...
Attract
Pull together
Repel
Push apart
What is the formula for calculating weight?
Mass x gravity
Matter x gravity
Mass + gravity
What is the formula for density?
m/v
mv
v/m
m+v
A measure of the amount of matter in an object.
mass
volume
density
weight
The amount of space an object takes up.
mass
volume
density
weight
The degree of compactness of a substance..
mass
volume
density
weight
A measure of the gravitational force exerted on an object.
mass
volume
density
weight
The ability of a fluid to exert an upward force on an object placed in it.
Density
Weight
Buoyancy
Gravity
As a substance is HEATED its VOLUME...
increase
decreases
remains equal
As a substance is COOLED its VOLUME...
increase
decreases
remains equal
As a substance is COOLED its DENSITY...
increase
decreases
remains equal
As a substance is HEATED its DENSITY...
increase
decreases
remains equal
As a substance is HEATED its MASS...
increase
decreases
remains equal
As a substance is COOLED its MASS...
increase
decreases
remains equal
A Fluid is anything that ______________
Floats
Flows
Flies
Falls
What is mass?
The size of an object
How much something weighs
The amount of matter in an object
The volume of an object
What is weight
The force of gravity acting on an object
The amount of particles in an object
The buoyant force acting on an object
The size of an object
The displacement method is used to find the ______________ of an object
Color
Mass
Weight
Volume
What is a force in science?
Something that causes a change in motion
When your parents make you do stuff
Something that doesn't cause a change in motion
Something that Starwars characters possess
What are balanced forces?
cause an object to stay still
cause an object to jump
cause an object to move
cause an object to balance on one foot
What are unbalanced forces?
Cause nothing to happen
Cause an object to move
Cause a disturbance in the force
Cause an object to stay still
The force of gravity ________
Pushes right
Pulls left
Pushes up
Pulls down
Bouyant Force ___________
Pushes Right
Pulls Left
Pushes Up
Pulls Down
Archimedes' Principle states __________a
The buoyant force acting on an object equals the force of gravity.
The buoyant force acting on an object equals the weight of the fluid displaced by the object.
The buoyant force acting on an object equals the weight of the object.
The buoyant force acting on an object equals the volume of the fluid displaced by the object.
Positive buoyancy is when ____________
the buoyant force is greater than the force of gravity
the buoyant force is less than the force of gravity
the buoyant force is the same as the force of gravity
the buoyant force has a good outlook on life
Neutral buoyancy is when ____________
The buoyant force is greater than the force of gravity
The buoyant force is less than the force of gravity
The buoyant force is equal to the force of gravity
The buoyant force isn't happy or sad.
Negative buoyancy is when _____________
The buoyant force is greater than the force of gravity
The buoyant force is less than the force of gravity
The buoyant force is equal to the force of gravity
The buoyant force has a poor outlook on life
When an object remains suspended in a fluid, we say that it is floating. Which of the following are terms related to the concept of floating?
buoyant force, density, gravity
buoyant force, density, viscosity
density, gravity, viscosity
gravity, viscosity, buoyant force
Wearing a life jacket while on a boat can help to save your life if you fall into the water. Why is this the case?
The life jacket is made of high-density materials.
The life jacket lowers your average density.
The life jacket raises your average density.
The life jacket stabilizes your density.
The operator of a ballast tank in a submarine spots an enemy ahead and decides to lower the submarine in the water. What will the operator do to achieve this task?
Let water out of the tank.
Let water into the tank.
Pump air into the tank.
Steer the submarine's nose downward.
Why does an airship float?
The weight of the air displaced by the ship is less than the weight of the airship itself.
The buoyant force of air is tremendous.
Helium is a very light gas.
The weight of the air displaced by the ship is greater than the weight of the airship itself.
Which is equal to the buoyant force acting on an object?
the container holding an object
the weight of the fluid displaced by an object
an object
the total volume of fluid
If the gravitational pull on an object suspended in a fluid is greater than the buoyant force, what will happen to the object?
It will be neutrally buoyant.
It will float
It will rise
It will sink
When gravity equals buoyancy, what is the resulting condition called?
Archimedes' principle
displacement
equilibrium
neutral buoyancy
An object is immersed in a fluid and neither rises nor sinks. What is this state called?
displacement
negative buoyancy
neutral buoyancy
positive buoyancy
When the weight of the fluid displaced by an object immersed in a fluid is greater than the force of gravity acting on the object, the object will ________
Float
Sink
Rise
Neither rise nor sink
When the weight of the fluid displaced by an object immersed in a fluid is less than the force of gravity acting on the object, the object will ________
Float
Sink
Rise
Neither rise nor sink
A river barge loaded with gravel comes to a bridge that is 5 cm too low for the barge to pass beneath. What is the best way to solve the problem?
Add more gravel to the load.
Have some of the crew members wait on the river bank.
Turn the barge around and find another route.
Unload some of the gravel.
The pull of gravity on an object is called the _______________________ of the object.
force
mass
weight
buoyancy
Average _______________________ is the total mass of an object divided by the total volume.
density
buoyancy
force
viscosity
Archimedes' principle states that the _______________________ force acting on an object equals the weight of the fluid displaced by the object.
gravitational
hydraulic
buoyant
magical
Submarines alter their buoyancy using ______________
Sherman tanks
ballast tanks
oil tanks
scuba tanks
Why do objects float better in salt water than in fresh water?
they don't float better in salt water.
higher density fluids create less buoyant force
higher density fluids lower the force of gravity
higher density fluids create more buoyant force
The winning boat in the class "Foil Boat Challenge" had the following characteritics.
Large wide hollow hull, spread-out washers
Long skinny hull, stack washers in one spot
Small thick hull, with few spots to place washers
