16
11 Priya and Lily investigate friction
Here is the equipment they use.
massos
wooden block
forcemeter
pull
table
material
They pull the wooden block with a forcemeter
They repeat the investigation using different materials
(a) Priya says
"We must be careful because we are using heavy masses."
Lily says
"We must make this investigation safe."
Describe two things they can do to reduce the risk of hurting themselves or others.
1
2
[2]
