Though most of us don’t think about if very often, simple machines-from ramps and levers to wheels and axles-are all around us. They make our lives easier in many ways. It would be awfully hard to ride a bike without the wheel and axle! Find out how some of our favorite simple machines work, and how they have changed our world. Book jacket.
Ex library – Used Item – Good Condition
Original price was: $10.00.$5.00Current price is: $5.00.
1 in stock
