Question 42
FA student measures the work done in pulling a wooden block along a bench.
The Figure shows the apparatus.
Figure
The student pulls the block 0.80 m along the bench and repeats the measurement of the force three times.
The Table shows the results.
Table
| Trial | Force in N\text{N}N |
|---|---|
| 1 | 3.1 |
| 2 | 3.4 |
| 3 | 3.2 |
a.[3]
Describe how the student can use this apparatus to measure the work done in pulling the block 0.80 m along the bench.
b.[2]
Calculate the mean force.
c.[2]
Calculate the work done in pulling the block 0.80 m along the bench, using the mean force.
d.[1]
Suggest why the readings on the force meter were different in each trial.