Sailboats, flagpoles, cranes
by Christopher Lampton · 1991
Examines simple machines that are actually pulleys, including flagpoles, cranes, and the pulleys on a sailboat.
PulleysSimple machinesJuvenile literatureMachinery
by Christopher Lampton · 1991
Examines simple machines that are actually pulleys, including flagpoles, cranes, and the pulleys on a sailboat.