What is this?
wedge
lever
What is this?
inclined plane
machine
What is this?
screw
lever
What is this?
machine
screw
What is this?
pulley
wheel
What is this?
lever
wedge
What is this?
wedge
screw
What is this?
lever
wheel and axle
What is this?
wheel and axle
lever
What is this?
wedge
screw
What is this?
machine
pulley
What is this?
wheel
pulley
What is this?
pulley
machine
What is this?
machine
inclined plane