Page 229 - SK Year 5 Science DLP

Gear Screw
The gear in this wristwatch The screw is used to fasten
is used to move and turn the the components of the
hands of the wristwatch. wristwatch.

Wheel and axle
The wheel and axle at
the crown is for setting
the wristwatch.

What will happen if the
wristwatch has no gear
and screw?
wristwatch

Wedge
The wedge at the
saw is used for
cutting tree branches.

Screw
The screw is used Pulley
to fasten the parts The pulley is
of the pruning saw. used for pulling

the wedge of the
pruning saw pruning saw.

Explain the combination of functions in simple
machines for another tool, which ensures that
HAWA 221
the tool can function well.