Is the picture below a first, second or third class lever ?
first class
Name a simple machine that reduces the friction (resistance of the surface) when moving objects.
Wheel and axle
Name a simple machine that has a flat supporting surface tilted at an angle, with one end higher than the other
inclined plane
What is the unit of force?
Newton (N)
Is the picture below a first, second or third class lever ?
second
Name a simple machine that uses a rope and can change the direction of a force
Pulley
Name a simple machine that is similar to a see-saw that can lift an object.
lever
Is the picture below a first, second or third class lever ?
first class
Is the picture below a first, second or third class lever ?
third class
Is the picture below a first, second or third class lever ?
second class