Page 230 - SK Year 5 Science DLP
P. 230
THE IMPORTANCE OF COMBINATION
OF SIMPLE MACHINES
Let us observe the situations below to understand the importance of
combination of simple machines in a tool.
Situation 1
Oh, how do I
pedal this bicycle?
Why can’t this tool be pedalled?
Situation 2
Oh, no! I can’t use
the scissors anymore.
Why can’t the scissors
be used?
The combination of simple machines in a tool is
important to ensure that it can function well. Why?
Can screws function if there are
222 no spiral or thread grooves?
10.1.3
