The box lists some types of energy.
| chemical | elastic | gravitational | kinetic | thermal |
The passage describes the process of dropping a heavy steel sphere onto a vertical buffer spring. Use words from the box to complete the passage. Each word may be used once, more than once, or not at all.
As the steel sphere falls freely downwards through the air, its \text{________________________} energy is mostly transferred to \text{________________________} energy.
When the sphere collides with the buffer spring and brings it to a halt, its \text{________________________} energy is mostly transferred to \text{________________________} energy stored in the spring.
The buffer contains a heavy steel spring. An engineer investigates a test spring of the same design to see if it obeys Hooke's law under compression.
She measures the compression of the spring for a range of different compressive forces.
Describe how the engineer could measure the compression of the spring.
The engineer finds that the spring does obey Hooke's law. Sketch a graph of her results on the axes below.
