1 markDefine the term translational motion.
1 markDefine the term translational kinetic energy.
1 markDescribe qualitatively the relationship between translational kinetic energy and the mass of the moving object.
1 markDescribe qualitatively the relationship between translational kinetic energy and the velocity of the moving object.
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1 markName one example of a type of potential energy.
2 marksDescribe the two conditions which must be met for a system to have potential energy.
3 marksA student makes the following claim:
"The potential energy of a system is path independent."
Identify whether the student is correct or incorrect. Justify your reasoning.
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1 markDefine elastic potential energy.
2 marksA spring is one example of an object that can store elastic potential energy.
Describe the properties of an ideal spring.
1 markDescribe qualitatively the relationship between elastic potential energy and the spring constant of the material.
1 markDescribe qualitatively the relationship between elastic potential energy and the extension or compression distance of the material.
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2 marksOn the diagram in Figure 1, draw lines to represent the gravitational field lines around the Earth.
Figure 1
On the diagram in Figure 2, draw lines to represent the gravitational field lines at the surface of the Earth.
Figure 2
2 marksA student makes the following claim:
"The gravitational field around the Earth is nearly constant at all points."
Identify whether the student is correct or incorrect. Justify your reasoning using your sketches from parts a) and b).
2 marksDescribe qualitatively the relationship between the change in gravitational potential energy at the Earth's surface and the height through which an object moves.
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1 markState the equation used for gravitational field strength when the moving object is so far from the Earth's surface that the field strength can no longer be approximated to be constant.
4 marksA student makes the following claim:
"Absolute gravitational potential energy always has a positive value."
Identify whether the student is correct or incorrect. Justify your reasoning.
1 markA system contains a star and three planets.
Write an expression for the absolute gravitational potential energy of the system.
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2 marks
Figure 1
A group of students are given a projectile launcher which consists of a spring with an attached plate, as shown in Figure 1. When the spring is compressed, the plate can be held in place by a pin at any of three positions A, B, or C.
Figure 2
Figure 2 shows a steel sphere placed against the plate, which is held in place by a pin at position C. The sphere is launched upon release of the pin.
The students have access to the projectile launcher and equipment usually found in a school laboratory.
The students are asked to take measurements to create a graph that could be used to determine the spring constant of the spring.
Describe an experimental procedure the students could use to collect the data needed to determine the spring constant of the spring. Include any steps necessary to reduce experimental uncertainty. If needed, you may include a simple diagram of the setup with your procedure.
2 marksDescribe how the data collected in part a) could be plotted to create a linear graph, and how that graph would be analyzed to determine the spring constant 
of the spring.
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