'A block & tackle uses 2 or more of this simple machine to reduce the amount of effort needed to lift a load'
a pulley
GENERAL SCIENCE: A block & tackle uses 2 or more of this simple machine to reduce the amount of effort needed to lift a load
A block & tackle uses 2 or more of this simple machine to reduce the amount of effort needed to lift a load
A block & tackle uses 2 or more of this simple machine to reduce the amount of effort needed to lift a load
GENERAL SCIENCE
a pulley
GENERAL SCIENCE