8. Complete Activity 10.8 (Page 119).
• Take a rubber band.
• Hold it at one end and pull from the other. The band stretches.
• Release the band at one of the ends.
• What happens?
• The band will tend to regain its original length. Obviously the band had acquired energy in its stretched position.
• How did it acquire energy when stretched?
Answer:
Aim: To hold the rubber band at one end and pull from the other and then release it and conclude based on the observations.
Materials Required: Rubber band.
Procedure:
(i) Hold one end of the rubber band with your left hand and pull the other end with your right hand. Observe what happens.
(ii) Now release the band at one end and observe what happens.
Observations:
- When pulled, the band stretches.
- When released, the band regains its original length.
Conclusions:
- When the rubber band was stretched work was done on it which was stored in the rubber band as potential energy.
- Upon release the original length was regained because the potential energy got converted into kinetic energy.
“• Take a rubber band.
• Hold it at one end and pull from the other. The band stretches.
• Release the band at one of the ends.
• What happens?
• The band will tend to regain its original length. Obviously the band had acquired energy in its stretched position.
• How did it acquire energy when stretched?” – Solved.
Related Links:
Solution to Activity 10.1
Solution to Activity 10.2
Solution to Activity 10.3
Solution to Activity 10.4
Solution to Activity 10.5
Solution to Activity 10.6
Solution to Activity 10.7
Solution to Activity 10.8
Solution to Activity 10.9
Solution to Activity 10.10
Solution to Activity 10.11
Solution to Activity 10.12
Solution to Activity 10.13
Solution to Activity 10.14
Solution to Activity 10.15
Solution to Activity 10.16
Solution to Activity 10.17
Solutions to Chapter 10 Work and Energy
