Two students investigated the force needed to slide a wooden block across a surface. They added an additional load on top of the wooden block to find out how this changed the
friction force
They plotted their results on this graph.
Predict the force needed to slide the block if it had a load of 7 kg.
Explain how you get your answer.
Hold a ruler up to your device screen to predict the next reading from the graph. 05
(2 points)
60
Z 50
40
Frictional force (N)
30
20
10
0
0
6
1 2 3
5
Mass on top of wooden block (kg)