1470788
9781403400581
Out of Stock
The item you're looking for is currently unavailable.
How are a water slide and a ski jump alike? Why is pushing something along a ramp much easier than lifting it in the air? Why do skis zigzag down a hill? How can a simple wedge stop an airplane? This book answers these questions and shows you how different kinds of these two simple machines are all around you to make your work and play easier.David Glover is the author of 'Ramps and Wedges (Simple Machines (Lerner Classroom))' with ISBN 9781403400581 and ISBN 140340058X.
[read more]