A
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This type of machine holds things together.
screw
The way objects move through air is called _______________.
aerodynamics
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This type of machine is used to lift or pull heavy weight.
pulley
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A force that pushes the ship upwards.
Buoyancy
A force that pushes the ship downwards.
Gravity
This is a force is when the car tires spin the tires pushing the road with an amount of force backwards.
Action force
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It is the force that pushes a plane or car forwards.
Thrust
This is a push that lets the plane move upwards.
Lift
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It is the force of gravity that pulls the plane towards the centre of the Earth.
Weight
A lever and its ___________ are used to lift heavy weight.
fulcrum
It is the air resistance that opposes the movement of a plane or car.
Drag
What must be greater than weight for a plane to take off?
Lift
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This is the resistance that the tires on a car's wheels meet when they move on a road surface.
Friction
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What must be more than lift for a plane to land?
Weight
This is when the road pushes the car with an equal amount of force forwards.
Reaction force
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What must be greater than drag for a plane to take off?
thrust
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A cargo ship has _____________ to help them change weight when they are with or without cargo.
water tanks
If a ship weighs less than the water it displaces, it will __________.
float
What must be more than thrust for a plane to land?
drag
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If a ship weighs more than the water it displaces, it will __________.
sink
When the size of thrust equal to the size of drag, the plane achieves a ____________________.
constant speed
When we put an object in water, it pushes the water away. As a result, the water level rises. What is this called?
Water displacement
When the size of lift equals to the size of weight, the plane achieves a ______________, with no change in altitude.
level flight
This states that an object immersed in water experiences an upward force which is equal to the weight of the water it displaces.
Archimedes' Principle of Buoyancy
It is a complex machine made up of an inclined plane, a lever and a wheel and axle.
wheelbarrow