Forces 1
What force causes a ball to fall down?
Gravity
What is a contact force?
When two surfaces come together.
A penguin moving down a snowy hill is exhibiting _____ friction.
little or no friction
What is an example of force stopping an object?
Catching a ball, putting brakes on to slow or stop a car
Brushing your hair is a push/pull force?
pull
Is gravity an example of a push or pull force?
pull
Forces acting on an object that do not cause the object to move.
Balanced forces?
What happens when when two North poles of a magnet move towards each other?
They repel (move away from each other)
What is an example of buoyancy?
A boat staying afloat on the water.
What type of machine would use air resistance?
aeroplane, kite, glider, wind surfer
Air resistance is this type of force.
What is friction?
What unit is used to measure force?
Newton
What happens when a North and a South pole of magnets move towards each other?
They attract ( make contact with each other)
Give an example how when force changes the shape of an object?
Making pottery
Plastercine or playdough
Neglecting air friction, If an elephant and a mouse were dropped from the roof of the school, who would hit the ground first?
Both would hit at the same time.
When a plane flies through the air, the forward force of the propellers or engine is called: _______
Thrust?
What force is used when we ride a bike?
Friction
What type of materials are attracted to magnets?
Metal (iron, steel, nickel)
Give an example of a contact force?
pressing a button. closing a door, kicking a ball
In which direction does friction act when a car is driving on the road in a westerly direction?
Opposite of the direction the car is travelling.Easterly
Type of frictional force that acts on objects as they travel through the air.
Air resistance force or drag?
Give an example of when there is little or no friction.
Slipping over on ice or a wet surface.
Give an example of a push force.
supermarket trolley. kicking a ball,
Leaves falling to the ground is an example of what type of force?
Gravity
Who developed the Law of Universal Gravitation?
Sir Isaac Newton