set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

The potential energy is always the same for an object with the same

a) Acceleration

b) Speed

c) Velocity

d) Position

Question : 2

Consider the following statements :

1. The objects appear to be more heavy when submerged in water than they are in air.
2. A needle place carefully on the surface of water may float, whereas a ball of the same material will always sink.

a) 1 and 2 both

b) 1 only

c) 2 only

d) None

Question : 3

An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil, then

a) is inclined to the horizontal with larger depth at the rear end

b) is inclined to the horizontal with smaller depth at the rear end

c) remains horizontal

d) assumes parabolic curve

Question : 4

In case of negative work the angle between the force and displacement is

a) 90°

b) 45°

c) 0°

d) 180°

Question : 5

When a stone tied to a string is whirled in a circle, the work done on it by the string is

a) zero

b) negative

c) positive

d) undefined

Question : 6

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