Simple or compound machine?
Knife - simple machine (wedge)
Simple or compound machine?
Stairs - simple machine (inclined plane)
Simple or compound machine?
Window blinds - simple machine (pulley)
Simple or compound machine?
Doorknob - simple machine (wheel and axle)
Simple or compound machine?
Can opener - compound machine (lever, wedge, wheel and axle)
Simple or compound machine?
Jar lid - simple machine (screw)
Simple or compound machine?
Seesaw - simple machine (lever)
Simple or compound machine?
Pencil sharpener - simple machine (wedge)
Simple or compound?
Bike - compound machine (wheel and axle, pulley, lever)
Simple or compound machine?
Drill - compound machine (screw, wheel and axle)
Simple or compound machine?
Scissors - compound machine (lever and wedge)