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MCQ: Surface that would better absorb infrared radiations is

1. Dull and white
2. Shiny and white
3. Dull and black
4. Shiny and black

C

Solid Friction: Viscosity Quiz

MCQ: Given that normal reaction is constant, friction force is

1. directly proportional to the area of the contact of the given surfaces
2. inversely proportional to the area of the contact of the given surfaces
3. directly proportional to the square of the area of the contact of the given surfaces
4. independent of the area of the contact of the given surfaces

D

Energy, Work and Power Quiz

MCQ: A car stopped screeching to avoid crash with a van, change is involved in process is

1. Kinetic energy is converted into sound energy
2. Kinetic Energy is converted into sound and thermal energy
3. Potential energy is converted into sound, heat and kinetic energy
4. Kinetic and potential energy is converted into thermal and sound energy

B

Work and Energy Quiz

MCQ: Formula for Kinetic energy is

1. 1/2mv²
2. 1/2m²v
3. mv²
4. mv-2

A

Introduction to Forces Quiz

MCQ: Type of force that opposes motion in fluids (water and air) is termed as

1. resistance
2. Tension
3. Weight
4. Friction

A