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WorksheetsGravity, air resistance and sound
Total questions: 70
Worksheet time: 1hrs 26mins
The amount of matter in an object.
Weight
Volume
Mass
Capacity
Which are the major factors that determine the strength of an object's gravitational pull:
Its mass
How close the things are together
The moon and the stars
Its shape
Will a feather and a watermelon fall at the same speed in a vacuum?
No, the feather will fall before
No, the watermelon will fall after
Yes
No, the watermelon will fall before
No, the feather will fall after
Without gravity if we throw an egg it...
will crash on the floor
won't crash on the floor
won't float into the air
will break in the air
The smaller the mass of the object...
the more gravity it will have.
the less gravity it will have.
Weight is ...
how tall something is
measure of inertia on an object
measure of the force of gravity on an object
The strength of the force of gravity depends on ...
distance between the two objects
mass of the two objects
mass of objects and distance between them
You weight ___________ on the moon.
the same
more
less
Which of the following will NOT change in different gravities?
Weight
force
mass
pounds
If an object weighs 67 N on Earth, what is the mass of the object?
67 kg
6.7 kg
656.6 kg
0.14 kg
An object has a mass of 72 kg. What is its weight on earth?
720N
705.6 m/s
7.35 m/s
7.35 N
The force of gravity acting on an object is 300 N. What is its mass?
30 kg
30.61 N
2,940 N
2,940 kg
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
The upward force which is exerted against a falling object is
gravity
terminal velocity
air resistance
intertia
What is Air Resistance
The force of water
The force that opposes the motion of objects falling through the Earth's atmosphere
A vacuum
Terminal Velocity
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
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?
Which two of these forces act on parachutes?
Air Resistance
Gravity
Thrust
Kinetic Energy
What causes an object to fall faster?
Smaller surface area
Larger surface area
If it has a parachute
If it is softer
Another name for air resistance is...
Buoyancy
Streamline
Gravity
Drag
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
Which has more air resistance?
If you jump out of an airplane, which two forces are acting on you?
Gravity and friction
Force and gravity
Gravity and Air Resistance
The force of ......... brings the man to the ground.
friction
gravity
thrust
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.
What is a parachute designed to maximize?
Gravity
Air Pressure
Air Resistance
Thrust
When surface area is less...
the force of gravity increases
the force of gravity decreases
air resistance increases
air resistance decreases
When dropped from the same height in air, which envelope will reach the ground first?
crumpled envelope
flat envelope
both
When dropped from the same height in air, which object will reach the ground first?
rock
feather
both
Two parachutists jump from the same height. Which parachutist will reach the ground first?
yellow
green
both
Which parachute experiences more air resistance?
yellow
green
Which statement is NOT true.
Air resistance acts upwards on the parachute
Gravity pulls the parachutist downward.
Force of air resistance acts in the opposite direction of the force of gravity.
Force of air resistance acts in the same direction as the force of gravity.
Which person experiences the greatest air resistance or drag?
Person A
Person B
Person C
When a parachutist jumps from a plane...
the force of gravity acting on the parachutist is less than the force of air resistance
the force of gravity acting on the parachutist is equal to the force of air resistance
the force of gravity acting on the parachutist is greater than the force of air resistance
When the force of gravity acting on the parachutist is equal to the force of air resistance...
the parachutist's speed increases.
the parachutist's speed remains the same (constant).
the parachutist's speed decreases.
When the parachutist opens his parachute...
the force of gravity acting on the parachutist becomes greater than the force of air resistance.
the force of gravity acting on the parachutist becomes equal to the force of air resistance.
the force of air resistance acting on the parachutist becomes greater than the force of gravity.
The greater the air resistance, less is the speed of the parachutist.
True
False
When dropped from the same height in air, which object will fall down with less speed (slowly)?
feather
ping pong ball
both fall at the same speed
When dropped from the same height in vacuum, which object will fall to the ground first?
feather
ping pong ball
both
If both cars travel at the same speed, which hand will experience more air resistance?
A
B
both the same
If both cyclists travel at the same speed, which cyclist will experience less air resistance?
A
B
Which aeroplane nose will experience less drag when moving through the air?
rounded
pointy
Which of the following can sound travel through?
Solid
Liquid
Gas
All the above
What material does sound usually travel through when an instrument is being played?
air
water
ground
tuba
When people talk their vocal cords___________________.
stretch
vibrate
swell
To vibrate means to ___________________.
move back and forth slowly
move back and forth quickly
move up and down slowly
Sounds can travel through air, water and solids to reach another animal.
True
False
Sound could be either soft or loud.
True
False
What do you think will happen when someone knocks on the door and your ear is on the other side of the door?
There will be no sound.
The sound will be carried by the wind.
You will hear sound because it travels through air.
You will hear sound because it travels through the door.
How does sound travel?
Through empty space
Through vibrating mediums
Through electrically charged particles
It doesn't travel; it just exists in space
How can sound travel through air?
Through open spaces
Through air particles bumping into each other
Through electronically charged particles
It doesn't travel; it just exists
Which of the following lists rate the materials in order from the best sound carrier (fastest) to the worst sound carrier (slowest)?
Gas, liquid, solid
Solid, gas, liquid
Liquid, solid, gas
Solid, liquid, gas
You cannot hear sound in space because its a __
vacuum
solid
air
Sound travel fastest through __ because the particles are closer together.
solids
liquids
gases
vacuum
When sound travels in solids, vibration is __________.
fast
irregular
modorate
slow
What affects the speed of the sound as it travels?
person receiving it
loudness of the sounds
the origin of the sound
the nature of the materials
