set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Energy conservation means

a) Energy could not be created but destroyed

b) Energy could be created

c) Generation and destruction of energy

d) Energy can neither be created nor destroyed

Question : 2

A fan is moving around its axis, What will be its motion regarded as ?

a) Skidding

b) Rolling with shipping

c) Pure rolling

d) Pure rotation

Question : 3

A coin is placed on a rotating disc and is stationary w.r.t. the disc, then the direction of friction is

a) towards the centre of the disc

b) opposite to the direction of motion of the coin w.r.t. ground

c) along the direction of motion of the coin w.r.t. ground

d) away from the centre of the disc

Question : 4

Consider the following statements.
A 4-wheel vehicle moving in a sharp circular path at high speed will

1. Overturn about its outer wheels
2. Overturn about its inner wheels
3. Skid outwards
4. Skid inwards

a) 2 and 3

b) 2 and 4

c) 1 and 3

d) 1 and 4

Question : 5

Which of the following time-displacement graph is not possible in nature?

a)

b)

c)

d)

Question : 6

Consider the following statements :

1. A person standing for a long time with a suitcase on his head does no work in terms of physics.
2. There cannot be any displacement of an object in the absence of any force acting on it.
3. The law of conservation of energy is valid in all situations and for all kinds of transformations.

a) 2 and 3

b) 1 and 2

c) 1 and 3

d) 1, 2 and 3