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WorksheetsFORCES AND MACHINES 4º
Total questions: 20
Worksheet time: 17mins
Force is ....
a pull that acts in an object
a push that acts in an object
a push or a pull in a particular direction in an object or a person
a push or a pull in a particular direction only in an object
Choose the CONTACT FORCES
Gravity
Buoyancy
Friction
Electrostatic
Choose the NON-CONTACT FORCES
Gravity
Buoyancy
Friction
Magnetism
What force is represented in the picture?
(a man falling to the ground)
Applied force
Buoyant force
Gravitational force
Frictional force
What force is represented in the picture?
Applied force
Buoyant force
Gravitational force
Frictional force
What force is represented in the picture?
Buoyant force
Frictional force
Magnetic force
Gravitational
The magnetic force can...
only attract objects
only repel objects
attract or repel objects
the magnetic force doesn't exist
What is going to happen?
They will repel
They will attract
NOTHING
Which are the poles of a magnet?
West-South
Only North
North-South
South-East
SIMPLE MACHINES are made of ___________
devices with few or no moving parts
many devices made of more than TWO machines
magnets
many different forces
This slide is an example of a(n) ....
... inclined plane
... lever
... pulley
...a wedge
There are...types of simple machines
2
4
6
8
This corkscrew is an example of a(n)...
Inclined plane and wedge
Wheel and axle
Lever and screw
Pulley and lever
This simple machine is a(n)...
Pulley
Wheel and axle
Lever
Inclined plane
What's the name of the fixed point on a lever?
(red triangle in the picture)
Force
Load
Fulcrum
Effort
Which of these objects is not a wedge?
Scissors
Knife
Ax
Skateboard ramp
What is it?
Complex machine
Simple machine
Big machine
Small machine
What is it?
Simple machine
Complex machine
A bycicle is a...
Complex machine
Simple machine
In this lever, what do these arrows mean?
The force you are doing
The fulcrum
The load
They are just decorative
