level: Forces and elasticity
Questions and Answers List
level questions: Forces and elasticity
| Question | Answer |
|---|---|
| Compare elastic and inelastic deformation. | Elastic deformation - the shape is reversed when the force is removed Inelastic deformation - the shape stays the same when the force is removed |
| What is the limit of proportionality. | The limit of proportionality is when Hooke's law (force = spring constant x extension^2) is no longer true. Due to spring been overstretched. |
| Hooke's law practical. | 1)Secure a clamp stand to the bench using a G-clamp or a large mass on the base. 2)Use bosses to attach two clamps to the clamp stand. 3)Attach the spring to the top clamp, and a ruler to the bottom clamp. 4)Adjust the ruler so that it is vertical, and with its zero level with the top of the spring. 5)Measure and record the unloaded length of the spring. 6)Hang a 100 g slotted mass carrier - weight 0.98 newtons (N) - from the spring. Measure and record the new length of the spring. 7)Add a 100 g slotted mass to the carrier. Measure and record the new length of the spring. 8)Repeat (previous step) until you have added a total of 1,000 g. 9)Plot on a graph |