Chapter 11. Force

1. In Fig 11.1, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?
(a)Magnitude of force applied by A is greater than that of B.
(b)Magnitude of force applied by A is smaller than that of B.
(c)Net force on the block is towards A.
(d)Magnitude of force applied by A is equal to that of B.

Ans: Photo  

Q2. In the circuit shown in Fig.11.2, when the circuit is completed, the hammer strikes the gong. Which of the following force is responsible for the movement of hammer?
(a)gravitational force alone  
(b)electrostatic force alone (c)magnetic force alone  (d)frictional force alone

Ans: Photo