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- Basics Concepts of Thermodynamics
- Zeroth Law of Thermodynamics
- First Law of Thermodynamics
- Second Law of Thermodynamics
- Thermodynamic Cycles
- Thermodynamic State Variables and Equation of State
- Enthalpy: Definition, Formula and Reactions
- State Functions
- Carnot Engine
- Heat Engine - Definition, Working, PV Diagram, Efficiency, Types
Centre of Mass & Momentum
Question 1
The centre of mass of a body is the point where:
- A
The body has maximum density
- B
All the mass of the body is concentrated
- C
The body is geometrically centered
- D
External forces are always applied
Question 2
For two point masses m₁ = 5 kg at x = 2 m and m₂ = 2 kg at x = 6 m, the centre of mass is located at:
- A
3.14 m
- B
4 m
- C
3.43 m
- D
2.86 m
Question 3
The centre of mass of a uniform solid sphere is located:
- A
At the surface
- B
At the geometric center
- C
Outside the sphere
- D
At 2/3 of the radius from center
Question 4
Momentum is defined as the product of:
- A
Mass and acceleration
- B
Mass and velocity (p = mv)
- C
Force and time
- D
Energy and displacement
Question 5
The law of conservation of momentum states that in an isolated system:
- A
Momentum always increases
- B
Total momentum before and after collision is equal
- C
Momentum converts to energy
- D
External forces conserve momentum
Question 6
Two balls with masses 5 kg and 2 kg move at 6 m/s and 2 m/s respectively and collide. After collision, the 5 kg ball moves at 5 m/s. The velocity of the 2 kg ball after collision is:
- A
4.5 m/s
- B
6 m/s
- C
3 m/s
- D
5.5 m/s
Question 7
The centre of mass of a uniform triangle is located at a distance from its base of:
- A
h/2
- B
h/3
- C
2h/3
- D
3h/4
There are 7 questions to complete.