Or
Option 2
Any one
Or
Option 3
Any one
5.1 |
A force is non-conservative if the work it does on an object which is moving between two points depends on the path taken. Or A force is non-conservative if the work it does on an object depends on the path taken. Or A force is non-conservative if the work it does in moving an object around a closed path is non-zero. |
2 marks (1 x 2 marks) |
5.2 |
No Tip: force F is the force of the engine; it increases the mechanical energy of the system, therefore, it is a non-conservative force. |
1 mark |
5.3 |
Option 1 Or Option 2 Tips:
|
3 marks (3 x 1 mark) |
5.4 |
The net/total work done on an object is equal to the change in the object's kinetic energy. Or The work done on an object by a net force is equal to the change in the object's kinetic energy. Tip: the work-energy theorem is asked frequently in exams. Ensure that you know the definition well, do not wait until right before the exam to memorise it. |
2 marks (1 x 2 marks) |
5.5
|
Tips:
Option 1
There are more ways to answer this question. To view other options, click here. |
5 marks (5 x 1 mark) |
Or
Option 2
Any one
Or
Option 3
Any one