Page 117 - SK Year 6 Science DLP

FORCE
FORCE
DAYA

In other circumstances, the frictional force produced creates problems and
needs to be overcomed or reduced.

Dad, look at this window. It
is making a creaking sound
and is more difficult to open.

Most probably the
window opener
is rusty.

It’s easy. We need to
apply some grease on
the surface of the window
opener that rubs against
each other.
See, there is no
more creaking
sound and this So, the use of lubricants such as grease or
window can be oil can reduce the frictional force on parts
opened easily. that rub against each other. Thank you, dad.

Do you know other ways of reducing
frictional force in our daily activities?

The use of rollers and wheels reduce
the frictional force and make objects
move easily.

The use of lubricants in motor vehicles reduces
the excessive frictional force in the engine
compartment.
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