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Forces

Total questions: 101

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

What is this tool called?

a)

Force meter

b)

Gravity meter

c)

Newton meter

d)

Weight meter

2.

Why do we use force meter?

a)
To determine the mass of an object
b)
To calculate the speed of an object
c)
We use a force meter to measure the force applied to an object.
d)
To measure temperature changes
3.

In which unit does the force meter measures?

a)
Newtons (N)
b)
Joules (J)
c)
Pascals (Pa)
d)
Kilograms (kg)
4.

Explain the relationship between weight and force?

a)
Weight is the mass of an object without any forces acting on it.
b)
Force is independent of weight and only depends on speed.
c)
Weight is a measure of an object's volume in space.
d)

Weight is a type of force caused by gravity. The heavier an object the more force it has.

5.

What is a force meter ?

a)
A force meter is used to calculate speed.
b)
A force meter is a device that measures distance.
c)
A force meter is a tool for measuring temperature.
d)

Device that measures, the amount of force is being used or the weight of an object in newtons

6.

An object only moves if a........ acts on it

a)
friction
b)
gravity
c)
inertia
d)
force
7.

....... pulls objects down to the ground

a)
Gravity
b)
Buoyancy
c)
Friction
d)
Magnetism
8.

We measure the pull of gravity using .....

a)
thermometer
b)
seismometer
c)
barometer
d)

Force meter

e)

Gravity meter

9.

Inside the force meter there is a........ that ........

a)

spring

Stretches

b)

battery

powers the device

c)

Spring

Pushes

d)

lever

lifts the weight

10.

The end of the spring has a ........ moves down the ........

a)

Ruler

Meter

b)

Spring

Scale

c)

Pointer/ marker

Scale

11.

What happens to the spring in the force meter when you add weight?

a)
The spring compresses under the weight.
b)
The spring remains unchanged regardless of weight.
c)
The spring breaks when weight is added.
d)
The spring stretches in response to the added weight.
12.

What happens to the spring in a force meter when you add heavier objects?

a)
The spring stretches less with heavier objects.
b)
The spring remains unchanged regardless of weight.
c)
The spring breaks when too much weight is added.
d)

The spring sttretches more as heavier objects are added.

13.

What happens if a very large object is added to the force meter?

a)
The force meter may break or give inaccurate readings.
b)
The force meter will display a higher weight than actual.
c)
The force meter will automatically adjust to accommodate the object.
d)
The force meter will continue to function normally without any issues.
14.

Why is a force meter sometimes and newton meter?

a)
A force meter is used to measure temperature in Celsius.
b)
A newton meter is a device that measures electrical current.
c)
A force meter is sometimes called a newton meter because it measures mass in kilograms.
d)
A force meter is sometimes called a newton meter because it measures force in newtons.
15.

The downward force of the gravity acts on all objects on earth.

a)

Yes

b)

No

16.

The downward force of gravity acts on......

a)

Humans

b)

Plants

c)

Animals

d)

Objects with no mass

e)

All living and nonliving things

17.

The down pull of gravity is called

a)
pressure
b)
force
c)
weight
d)
mass
18.

Why do things fall to the ground when we drop them?

a)
Things fall to the ground because of gravity.
b)
Items drop because of their color.
c)
Objects fall because they are heavy.
d)
Things fall due to wind pressure.
19.

How would life be different if there was no gravity?

a)

We would fly over the planet.

b)

Nothing will change

c)

If you throw a ball into the air, it would continue to go up

d)

Trees and houses would fly away

e)

Water in rivers, lakes and seas might fly away

20.

How is gravity in space different from gravity on Earth?

a)
Gravity in space only affects large objects like planets.
b)

Gravity in space is less than on Earth

c)
Gravity in space is the same as on Earth.
d)
Gravity in space is stronger than on Earth.
21.

List at least 3 Examples where force of gravity is being used.

4 lines
22.

Explain why every object fall down when dropped.

a)
Objects fall down because they are heavy.
b)
Objects fall down because they are pushed by the wind.
c)
Every object falls down when dropped because of the force of gravity acting on it.
d)
Objects fall up due to magnetic forces.
23.

More weight = ......

a)

More gravity

b)

Less gravity

c)

no gravity

24.

Less weight =.........

a)

Less gravity

b)

More gravity

c)

No gravity

25.

Weight = gravity

a)

Yes

b)

No

26.

Who experience more force of gravity ?

a)

The lion

b)

The monkey

c)

Both experience the same force / gravity

27.

Why does the lion experiences more force /gravity than the monkey?

a)

The lion experiences more force because it hast greater weight

b)
The lion experiences less force because it is more agile.
c)
The monkey is lighter due to its smaller bones.
d)
The lion is heavier because it has more fur.
28.

we can see the Earth gravity.

a)

Yes

b)

No

29.

What is gravity?

(a)  

30.

Why do sky divers use parachute when they jump out of an airplane?

a)
To avoid getting lost in the sky.
b)
To perform aerial tricks while falling.
c)
To increase their speed during free fall.
d)

Because we need to use more forces than the force of gravity to pull object up

31.

The force of gravity act on......... on earth

a)
only living beings
b)
objects without mass
c)
only large objects
d)
all objects with mass
32.

Why is it difficult to pull up a heavy object?

a)

The more weight the more gravity so we need more force to pull it up

b)

Because the less the weight the more the gravity, so we need more force to pull it up

c)

It is not difficult to pull it if you use a machine

33.

Gravity............. us on the ground and make things......... the ground

a)

Keeps

To Fall down

b)

Lifts

Push up from

c)

Keeps

Fly up

34.

Gravity is a force of ......

a)

Pull

b)

Push

c)

Friction

35.

We feel our weight because of ...........

a)

Gravity

b)

Mass

c)

The push force

36.

Gravity will never push us

a)

Yes

b)

No

37.

All stars moon and planets, have their own gravity and is different form one another

a)

Yes

b)

No

38.

Friction works in the ............. direction as force

a)
random
b)
perpendicular
c)
same
d)
opposite
39.

What happens if you push a book that is resting on the table ?

which force acts on it?

a)

A push force is applied to the book, and friction acts against it.

b)
The book will be pushed off the table without any friction.
c)
The book will remain stationary without any force acting on it.
d)
The book will float off the table.
e)

The book will move

40.

Friction can be .....

a)

Useful

b)

Useless

c)

Dangerous

41.

When we are investigating or counting something you can use

a)
case studies
b)
focus groups
c)
interviews
d)

Bar chart

42.

.......... are useful in comparing data in different categories.

a)
Tables and lists
b)
Text descriptions
c)
Images and photos
d)

Bar chart

43.

How does friction help Moving vehicles?

a)
Friction reduces the speed of vehicles by creating drag.
b)
Friction is only important for stationary vehicles.
c)
Friction has no effect on the handling of vehicles.
d)

It gives tires grip on the road.

44.

How does friction help cars stoping safely?

a)
Friction increases speed and makes stopping harder.
b)
Friction has no effect on a vehicle's stopping distance.
c)
Friction only works on dry surfaces, not wet or icy ones.
d)

Brakes use the friction to slow down

45.

How can friction helps preventing slips?

a)
Friction has no effect on safety for vehicles.
b)
Friction increases speed for vehicles and people.
c)
Friction causes skidding and loss of control.
d)

It keeps people and vehicles from sliding

46.

How can friction helps in climbing hill?

a)
Friction has no effect on climbing hills at all.
b)
Friction helps in climbing hills by providing grip that prevents slipping.
c)
Friction makes climbing hills more difficult by increasing sliding.
d)
Friction only helps in descending hills, not climbing.
47.

Why do you think objects slide farther on smooth surfaces than on rough surfaces?

(a)  

48.

What happens to the speed of an object when it moves on a rough surface, and why?

(a)  

49.

If you wanted to make an object move faster, would you choose a rough or smooth

surface? Why?

(a)  

50.

  • You will slide faster if there is ............. friction on a playground slide.

a)
less
b)
no
c)
equal
d)
more
51.

  • Which material would make more friction if you rubbed your hand on it?

a)
wood
b)
metal
c)
glass
d)
carpet
52.

  • To slow down a speeding bike, brakes create .............of friction against the tires.

a)

Some

b)

A lot

c)

A little

d)

No

53.

  • If you tried to walk on ice you might slip because there is ..........friction.

a)
too much friction
b)
too little friction
c)
no friction at all
d)
moderate friction
54.

  • It is easier to pedal a bike on a dirt trail / a smooth road because there is more / less friction.

a)
a dirt trail / more
b)
a smooth road / less
c)
a smooth road / more
d)
a dirt trail / less
55.

  • Friction is a force that happens when two surface .......... across each other.

a)
stick
b)
bounce
c)
rotate
d)

Move

56.

  • A friction force is in the ........... direction to movement.

a)
opposite
b)
random
c)
same
d)
perpendicular
57.

  • Surfaces are never completely .............

a)
rough
b)
bumpy
c)
textured
d)
smooth
58.

  • Friction is the force between two surfaces that .......... moving objects.

a)
stabilize the direction of
b)
increase the distance of
c)

Slows down

d)

Speeds up

59.

What is friction?

(a)  

60.

Friction is ......... force.

a)
a magnetic force
b)
an inertial force
c)
a gravitational force
d)

invisible

e)

Visible

61.

Friction is a force that acts.......... or ........... movement so that things would slow down or even stop moving.

a)

Against or resists

b)

With or promotes

c)

With or resist

d)
supports or enhances
62.

Why does friction occur?

a)
Friction happens when surfaces are far apart.
b)
Friction is caused by the absence of motion.
c)
Friction occurs only in liquids.
d)

Because the surfaces of objects are never completely smooth

63.

When does friction occur?

a)
Friction occurs only in liquids.
b)
Friction is present in a vacuum.
c)
Friction happens when surfaces are far apart.
d)

When two surfaces come in contact with each other

64.

Even surfaces that look smooth have tiny.......... and ....... on them.

a)
colors and shades
b)
patterns and textures
c)
flaws and bumps
d)

Grooves and ridges

65.

How can we increase friction?

a)
Increase temperature of the surfaces
b)
Use lubricants
c)
Decrease surface roughness
d)

Using rough surfaces

e)

Pressing surfaces together more strongly

66.

How to decrease friction?

a)

Use smooth surfaces.

b)
Increase surface roughness
c)
Apply heat to the surfaces
d)
Use heavier materials
67.

There is..... friction on surfaces, which is rough

a)

More

b)

Less

c)

No

68.

Frictions happen when grooves and tidges of one surface......... the grooves and ridges of the other surface, they........ together and this...... the force of friction between............

a)

Meet; resist; increases; surfaces.

b)
slide; push; decreases; objects.
c)
separate; enhance; reduces; layers.
d)

Meet, stick, reduce, objects

69.

What is an opaque material?

a)
An opaque material is one that does not allow light to pass through.
b)
A material that allows some light to pass through.
c)
A transparent material that reflects light.
d)
A material that glows in the dark.
70.

What is a translucent material?

a)
A translucent material is one that reflects all light without any transmission.
b)
A translucent material is completely opaque and blocks all light.
c)
A translucent material is a solid that allows for perfect visibility through it.
d)

I translucent material is material that allows some light to go through it.

71.

What is a transparent material?

a)
A transparent material is one that scatters light in all directions.
b)
A transparent material is one that reflects light completely.
c)
A transparent material is one that absorbs all light.
d)

Transparent material is the one that allows all light pass through

72.

Glasses are....

a)

Transparent

b)

Translucent

c)

Opaque

73.

Football is

a)

Transparent

b)

Translucent

c)

Opaque

74.

A glass window is

a)

Translucent

b)

Opaque

c)

Transparent

75.

Plastic bottle is

a)

Transparent

b)

Translucent

c)

Opaque

76.

Transparent material let's all light go through so we .......... through them.

a)

cannot see clearly

b)

can see clearly

c)

can blury see

d)

cannot see at all

77.

Opaque materials block light completely so we ...... through them

a)

cannot see clearly

b)

can see but clearly

c)

Can see

d)

Cannot see

78.

Translucent materials block some light, so we ........ through them.

a)
can only see shadows
b)

can see through them but not clearly

c)
cannot see through them
d)
can see reflections but not through them
79.

.......... material allow us to see things on the other side.

a)

Transparent

b)

Translucent

c)

Opaque

80.

What material do we use for cars windscreens?

a)
Acrylic glass
b)

Transparent glass

c)

Metal

d)

Plastic

81.

Materials can be compared and classified according to........

a)
size and shape
b)
color and texture
c)
cost and availability
d)

How much light can pass through them

82.

What do we need to form my shadow?

a)
A light source, a mirror, and a window.
b)

A light source and an object to block the light

c)
An object, a camera, and a projector.
d)
A mirror, a wall, and a flashlight.
83.

How does the size of shadow change?

4 lines
84.

Where will the shadow fall if I place the light source on the right side or the left side of the object?

a)
The shadow will fall to the opposite side of the light source.
b)
The shadow will fall directly under the object.
c)
The shadow will fall in front of the light source.
d)
The shadow will fall to the same side as the light source.
85.

What will happen to the shadow if I move the object closer to the light source?

a)
The shadow will disappear completely.
b)
The shadow will change color to red.
c)

The shadow will become smaller.

d)
The shadow will become larger and blurrier.
86.

What is a shadow?

a)
A shadow is a color created by light.
b)
A shadow is a solid object.
c)
A shadow is a type of light.
d)

A shadow is a dark area that is formed when the

path of light is blocked.

87.

The size of the shadow is dependent on the .......

a)
color of the object
b)
material of the shadow
c)
time of day
d)

position of the light source

88.

What happens to the shadow size if we move the light source closer to the object?

a)
The shadow size increases.
b)
The shadow disappears completely.
c)
The shadow size decreases.
d)
The shadow size remains the same.
89.

If the light falls on the right side of the object, where will the shadow fall?

a)
The shadow will fall above the object.
b)
The shadow will fall directly behind the object.
c)
The shadow will fall on the left side.
d)
The shadow will fall on the right side.
90.

Does everything have a shadow?

a)
No, not everything has a shadow.
b)
Shadows are only created by light sources.
c)
Only large objects have shadows.
d)
Yes, everything has a shadow.
91.

Shadow will be .......... in the morning and evening and .......... during the noon time.

a)
short; long
b)
tall; wide
c)
dim; bright
d)
long; short
92.

If the sun is in the east, the light shadow will be in the......

a)
east
b)
west
c)
south
d)
north
93.

When light source is Far from the object the shadow will be

a)
colorful and bright
b)
fuzzy and indistinct
c)
completely absent
d)

Smaller

94.

When light source is near the object the shadow will be...

a)
smaller and more defined
b)
invisible and sharp
c)

larger

d)
static and bright
95.

The distance between object and light source ............. the size of the shadows of

the object.

a)
varies randomly
b)
remains constant
c)
decreases
d)

affect

e)

Will not affect

96.

Because of ............., shadows change their position, and size during the day.

a)
the moon
b)
the clouds
c)
the sun
d)

earth rotation

97.

Because of earth rotation shadows changed their........... and ......... during the day.

a)
size and position
b)
color and shape
c)
speed and angle
d)

Size and brightness

98.

In the morning and in the afternoon, the shadow is longer because

a)
the shadow is cast by artificial light
b)
the ground is uneven
c)
the sun is directly overhead
d)

The sun is shining on the object at an angle

99.

In the morning and in the afternoon, the shadow will be longer because.

4 lines
100.

At noon, the shadow will be the shortest because

a)
the earth is tilted away from the sun, creating less light.
b)
the sun is at its highest point, causing shorter shadows.
c)
the weather is cloudy, blocking the sun's rays.
d)
the sun is setting, causing longer shadows.
e)

The sun is directly over the object

101.

The ............ in a force meter can measure the force of gravity.

a)

spring

b)
torque wrench
c)
pressure gauge
d)
weight scale

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