set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

A balloon filled with CO₂ released on earth would (neglect viscosity of air)

a) fall with a constant acceleration 3.4 m/s²

b) fall with an acceleration 9.8 m/s²

c) climb with an acceleration 9.8 m/s²

d) fall with acceleration and then would attain a constant velocity

Question : 2

A passenger in a moving train tosses a coin. If the coin falls behind him, the train must be moving with

a) a uniform speed

b) a deceleration

c) an acceleration

d) any of the above

Question : 3

A man waves his arms while walking. This is to

a) increase the velocity

b) ease the tension

c) keep constant velocity

d) balance the effect of earth’s gravity

Question : 4

Which one of the following is a vector quantity?

a) Energy

b) Pressure

c) Momentum

d) Work

Question : 5

Four cars A, B, C and D are moving on a levelled road. Their distance versus time graphs are shown in figure. Choose the correct statement.

a) Car C is faster than car D.

b) Car B is the slowest.

c) Car A is faster than car D

d) Car C is the lowest.

Question : 6

Two bodies A and B have masses M and m respectively where M > m and they are at a distance d apart. Equal force is applied to them so that they approach each other. The position where they hit each other is

a) at equal distance from A and B

b) nearer to A

c) nearer to B

d) cannot be determined