10. Complete Activity 10.10 (Page 119).
• Take a toy car. Wind it using its key.
• Place the car on the ground.
• Did it move?
• From where did it acquire energy?
• Does the energy acquired depend on the number of windings?
• How can you test this?
Answer:
Aim: To wind the toy car, observe what happens and conclude.
Materials Required: Toy car with key.
Procedure:
(i) Wind the toy car using its key in one direction.
(ii) Place it on the ground and observe what happens.
(iii) Now vary the number of times you wind the car and observe what happens.
Observations:
- The toy car moves freely after being wound.
As you increase the number of times you wind the car, it goes further.
Conclusions:
- When you wind the car, potential energy is stored in its spring. This gets converted into kinetic energy and the car moves forward.
- More windings result in a greater amount of potential energy stored in the spring, leading to a longer distance travelled by the car.
“Take a toy car. Wind it using its key.
Place the car on the ground.
Did it move?
From where did it acquire energy?
Does the energy acquired depend on the number of windings?
How can you test this?” – 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
