A student investigates how the resultant force on a trolley affects its acceleration.
She keeps the mass of the trolley the same. She uses a light gate to measure the acceleration.
The Table shows her results.
Table
| Resultant force in N\text{N}N | Acceleration in m/s2\text{m/s}^2m/s2 |
|---|---|
| 0.50 | 0.25 |
| 1.00 | 0.50 |
| 1.50 | 0.68 |
| 2.00 | 1.00 |
| 2.50 | 1.25 |
State the independent variable in this investigation.
One of the results is anomalous.
Identify the anomalous result and suggest what the student should do about it.
Describe the relationship between resultant force and acceleration shown by the results.
Use the equation: force=mass×acceleration\text{force} = \text{mass} \times \text{acceleration}force=mass×acceleration
Use the result for 2.00 N to calculate the mass of the trolley.
The runway has friction.
Suggest one way the student could reduce the effect of friction on her results.
50 exam-style questions on OCR GCSE Physics 2.2 Newton’s laws, covering 2.2.1 Interactions between objects, 2.2.2 Force pairs in interactions, 2.2.3 Forces as vectors, 2.2.4 Newton's first law, 2.2.5 Resolving forces with vector diagrams, 2.2.6 Forces acting on an isolated object, 2.2.7 Free body diagrams and resultant force, 2.2.8 Free body diagrams for balanced forces, 2.2.9 Newton's second law, 2.2.10 Inertia and inertial mass, 2.2.11 Momentum in collisions, 2.2.12 Relating force, mass, velocity and acceleration, 2.2.13 Work done by a force, 2.2.14 Work, stored energy and units of energy, 2.2.15 Power as the rate of energy transfer, 2.2.16 Newton's third law, and 2.2.17 Circular motion and changing velocity. Each one has a worked solution and a mark scheme showing where the marks go.