CH.3 Machine

1. Which of the following is speed multiplier?

• Scissors
• Long handle oar
• Human hand
• All of these

2. Which of the following is force multiplier?

• Movable pulley
• Tong
• Fishing rod
• All of these

3. In movable pulley if Load moves by x cm then effort moves by....

• 2 x
• X
• x/2
• None

4. Block and tackle system has 3 pulley. It's VR and MA in ideal case will be respectively..

• 3 , 3
• 3, less than 3
• Less than 3, 3
• None

5. Friction in machines affects...

• MA
• VR
• Both MA and VR
• None