A student investigates the acceleration of a trolley on a horizontal track. A force is applied using weights on a hanger, and the acceleration is measured with a light gate.
Here are the student's results:
| Force (N) | Acceleration |
|---|---|
| 0.5 | 0.62 |
| 1.0 | 1.25 |
| 1.5 | 1.9 |
| 2.0 | 2.50 |
| 2.5 | 3.12 |
The student has made two mistakes in the presentation of their results table. Identify these two mistakes and suggest corrections for them.
The student plots a graph of Force (on the vertical yyy-axis) against Acceleration (on the horizontal xxx-axis).
Describe the relationship shown between the force and acceleration if the line is straight and passes through the origin.
Calculate the gradient of the graph of Force versus Acceleration using the coordinates 2.50,2.002.50, 2.002.50,2.00 from the line of best fit. State the physical quantity and unit that this gradient represents.
The trolley moves a distance of 75 cm75\text{ cm}75 cm along the desk under a constant force of 1.5 N1.5\text{ N}1.5 N.
Calculate the work done on the trolley. Give your answer to 2 significant figures.