Question

QII. State whether the following statements are true or false. Rewrite the false statements
correctly.
1. Sewing machine is an example of a simple machine.
2. Crowbar helps us to multiply force.
3. Output energy is the useful work done by a machine
4. A nut-cracker is an example of a class - III lever.
5. Friction reduces the efficiency of the machine.​

Answer 1

Answer:

1. False, it is an example of a complex machine.

2. False

3. True

4. True

5. True