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WorksheetsMagnets and Forces
Total questions: 75
Worksheet time: 1hrs 22mins
(a)
If a tennis ball was rolled down a ramp onto each of these surfaces, which would let the ball travel the furthest?
Grass
Sandpaper
Concrete
Glass
Which metal is attracted to a magnet?
Silver
Iron
Copper
Gold
(a)
1
2
3
As the Earth turns on its axis, the metals
become magnetic and the Earth turns into a giant magnet.
Is the given statement true or false?
True
False
Are all types of metal magnetic?
Yes
No
1
2
3
These two magnets will repel. A _____________ force makes the repel without even touching!
gravitational
magnetic
frictional
pole
What happens if you hold the south pole of one magnet close to the north pole of another magnet?
They will attract each other
They will repel each other
They will grow very hot
Nothing will happen
speakers
doorbells
junkyard cranes
all of the above
Magnet can make _________ objects move towards it.
Metal
Non-metal
Magnets come in different shapes and sizes
What are the poles of a magnet called?
North and West
North and East
East and West
North and South
What is a force?
Forces are pushes and pulls.
Forces are things that move sideways.
A force is a fancy word for fork.
Why does ice have less friction?
Because it is frozen water.
Because it is a smooth surface.
Because it is cold.
Because it is slippy.
Will a toy car slow down quicker on carpet or foil?
Carpet because it is a rough surface and has more friction.
Carpet because it is a rough surface and has less friction.
Foil because it is a smooth surface and has more friction.
Foil because it is a smooth surface and has less friction.
What happens when you break a permanent magnet in half?
it stops working
you have 2 magnets, one magnet has 2 North poles and the other magnet has 2 South poles
you have 2 magnets, each with a North and South Pole
Which is needed to determine the amount of gravitational force between two objects?
distance and mass
weight and time
area and weight
The gravitational force exerted by an object depends on its
volume
mass
weight
The gravitational force between two objects changes with the distance between the two objects
True
False
An object with more mass will exert greater gravitational force than an object with lesser mass.
True
False
A student drops a bowling ball and an apple from a third-story window. Both objects hit the ground at the same time. From the experiment, the student should conclude that
the apple weighs more than the bowling ball
more air friction is acting on the apple than on the bowling ball
gravity pulls on both objects, causing them to fall at the same time.
An astronaut way out in space is considered to be “weightless". This is because–
his mass is so small relative to the earth that gravity doesn’t affect him.
gravitational force decreases greatly over long distances.
gravitational force pushes objects away from each other at long distances.
objects far away from the earth have less mass.
Which statement is true?
All objects with mass exert a gravitational force.
Only celestial objects exert a gravitational force.
Gravity can both push and pull objects.
Only Earth exerts a gravitational force.
As the mass of an object increases, the gravitational force acting on it ......................
Increases
Decreases
Stays the same
The picture shows a boy pulling
a box. How can he move the box
more easily?
Using wooden rollers.
Put a cloth under the box and pull it using the cloth.
Create a pattern on the surface of the box.
Ensure the surface of the box is clean.
Ways to reduce frictional force (you can choose more than one)
use lubricants
use grease
use magnesium carbonate chalk powder
use rollers and ball bearings
If the type of surface is smoother, the distance traveled by the toy car will be (a)
The frictional force (a) caused the boy to fall.
The use of lubricants in motor vehicles ______________
the excessive frictional force in the engine
compartment.
reduces
increases
reuses
enlarge
Anytime two surfaces of objects rub each other, they cause _ _ _ _ _ _ _ _.
(a)
Friction can stop object from moving.
True
False
Friction always slows down a moving object.
True
False
How does friction help people in the cold?
keep healthy by eating fruits
keep fit by rubbing hands together
keep warm by rubbing hands together
Smooth surfaces have ...
more friction
less friction
the same level of friction
If the surface is smooth, the speed traveled by the toy car will be __________.
faster
slower
Ways to increase frictional force
(You may tick more than one answer)
use treaded tyres for cars
use smooth shoe soles without grooves
wiping wet balls when playing netball
use studded shoes when play football
There are deep treads on the tyre because they ___________.
increase the stopping distance of the car
reduce the amount of material used
increase friction
The larger the surface area of the moving object, the ___________ air resistance there is.
Less
More
Longer
Quicker
Air resistance pushes against falling
objects and __________________.
Speeds them up
Keeps them afloat
Slows them down
Spins them
The more streamlined an object is, the...
More air resistance
Less air resistance
Slower air resistance
Faster air resistance
When dropped from the same distance, which will fall to the floor faster?
This friction is....
useful
a problem
This friction is.....
useful
a problem
An object is falling downward through Earth's atmosphere. In which direction is the air resistance force?
Down
Up
Around the object
Through the object
If you jump out of an airplane, which two forces are acting on you?
Gravity and friction
Force and gravity
Gravity and Air Resistance
Look at the pictures of the cars. Which car will have the most air resistance force acting upon it? They will be moving at the same speed.
All will have equal air resistance force.
Air resistance is a force caused by...
Water pushing against moving objects
Air pushing against moving objects
Gravity pushing against moving objects
Normal force pushing against moving objects
Which is the best description of the purpose of a lubricant?
Reduces the amount of friction and increases the amount of thrust
Reduces the amount of friction and increases useful energy transfer
Reduces wasteful energy transfer and increases the amount of thrust
Which of these materials do you predict would have the MOST amount of friction?
metal
tile
sand paper
denim
What is water resistance ?
friction between moving object in water
gravity in water
pulling force
friction between moving object in air
How water resistance can be reduced ??
streamline body
less weight
more surface area
What makes water resistance similar to surface friction ?
slows things down
increases the friction
decreases the surface area
increases the surface area
Why do sharks not find it difficult to swim in water?
because they have larger surface body
because they have streamlined body which allow water to pass through easily
because they have more weight
The heavier the weight, the ------------------ the stretch of the spring.
(a)
When you push down on a spring, ------------------------------
the spring pulls down on your hand.
the spring pushes up against your hand.
What is being described here?
"A force that occurs when two objects are touching is a..."
contact force
non-contact force
1
2
3
