- 1. Mechanics is the branch of physics concerned with the behavior of physical bodies when subjected to forces or displacements, and the subsequent effects of such bodies on their environment. It involves the study of motion, forces, energy, and interactions between objects. Mechanics encompasses various subfields such as classical mechanics, quantum mechanics, and fluid mechanics, each dealing with different aspects of physical phenomena. Understanding mechanics is essential in many scientific and engineering disciplines, as it provides the foundation for analyzing and predicting the behavior of systems in the physical world.
Which law states 'An object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by an external force'?
A) Newton's Third Law of Motion
B) Newton's First Law of Motion
C) Law of Universal Gravitation
D) Newton's Second Law of Motion
- 2. What is the SI unit of Speed?
A) Kilogram (kg)
B) Meter per second (m/s)
C) Kelvin (K)
D) Coulomb (C)
- 3. What is the Equation of Motion that relates distance, initial velocity, time, and acceleration?
A) P = mv
B) F = ma
C) s = ut + (1/2)at2
D) v = u + at
- 4. Which of the following is a vector quantity in Mechanics?
A) Temperature
B) Displacement
C) Mass
D) Pressure
- 5. What is the SI unit of Work and Energy?
A) Joule (J)
B) Newton (N)
C) Pascal (Pa)
D) Watt (W)
- 6. Which law states 'For every action, there is an equal and opposite reaction'?
A) Newton's Third Law of Motion
B) Law of Reflection
C) Law of Conservation of Energy
D) Newton's Second Law of Motion
- 7. What is the formula for calculating Pressure in Fluid Mechanics?
A) P = W/t
B) P = F/A
C) P = mv
D) P = ρgh
- 8. Which of the following equations represents Newton's Second Law of Motion?
A) v = u + at
B) P = mv
C) F = ma
D) s = ut + (1/2)at2
- 9. What is the SI unit of Pressure?
A) Coulomb (C)
B) Joule (J)
C) Newton per meter (N/m)
D) Pascal (Pa)
- 10. Which law states 'The rate of change of momentum of an object is directly proportional to the net force acting on it'?
A) Newton's Second Law of Motion
B) Newton's Third Law of Motion
C) Newton's First Law of Motion
D) Law of Conservation of Energy
- 11. What does it mean for an object to be in 'Dynamic Equilibrium'?
A) Object accelerating with unbalanced forces
B) Object moving at varying speeds
C) Object at rest with no forces acting on it
D) Object moving at a constant velocity with balanced forces
- 12. What principle states that the total mechanical energy of a system remains constant if only conservative forces are acting on it?
A) Newton's Second Law of Motion
B) Law of Conservation of Mechanical Energy
C) Law of Inertia
D) Hooke's Law
- 13. Which law relates the gravitational force between two objects to their masses and the distance between them?
A) Hooke's Law
B) Archimedes' Principle
C) Newton's First Law of Motion
D) Law of Universal Gravitation
- 14. What is the rate of change of velocity with respect to time called?
A) Acceleration
B) Speed
C) Velocity
D) Displacement
- 15. What type of force acts against the motion of an object through a fluid like air or water?
A) Frictional force
B) Tension force
C) Drag force
D) Normal force
- 16. Which of the following represents the resistance of an object to changes in its state of motion?
A) Elasticity
B) Friction
C) Momentum
D) Inertia
- 17. What is the product of mass and velocity of an object called?
A) Momentum
B) Energy
C) Force
D) Acceleration
- 18. Which type of equilibrium exists when an object is at rest and stays at rest under the application of external forces?
A) Neutral equilibrium
B) Static equilibrium
C) Mechanical equilibrium
D) Dynamic equilibrium
- 19. What is the term used to describe the force that opposes the relative motion or tendency of such motion of two surfaces in contact?
A) Friction
B) Momentum
C) Tension
D) Inertia
- 20. Which theorem states that the net work done on an object is equal to the change in its kinetic energy?
A) Bernoulli's Theorem
B) Uniform Circular Motion Theorem
C) Law of Inertia
D) Work-Energy Theorem
- 21. What is the measure of the inertia of an object?
A) Volume
B) Mass
C) Density
D) Weight
- 22. Which type of force acts on an object suspended in a fluid and is equal to the weight of the fluid displaced by the object?
A) Tension force
B) Buoyant force
C) Normal force
D) Static friction
- 23. Which of the following is a measure of how difficult it is to compress a substance or change its shape?
A) Density
B) Bulk modulus
C) Viscosity
D) Elasticity
- 24. What is the term for the force that causes an object to move in a circular path?
A) Tension force
B) Frictional force
C) Centripetal force
D) Drag force
- 25. What is the SI unit for force?
A) Joule
B) Ohm
C) Watt
D) Newton
- 26. What force pulls objects towards the center of the Earth?
A) Tension
B) Friction
C) Gravity
D) Buoyancy
- 27. On which principle do hydraulic lifts operate?
A) Bernoulli's Principle
B) Archimedes' Principle
C) Pascal's Principle
D) Newton's Third Law
- 28. What is the principle that states 'A body submerged in a fluid experiences an upward force equal to the weight of the fluid displaced'?
A) Boyle's Law
B) Hooke's Law
C) Archimedes' Principle
D) Newton's Law of Gravitation
- 29. What is the term used for the ability of an object to float in a fluid?
A) Drag
B) Friction
C) Tension
D) Buoyancy
- 30. What is the rate at which work is done or energy is transferred called?
A) Power
B) Momentum
C) Force
D) Energy
- 31. According to Newton's third law of motion, for every action there is an equal and opposite ______.
A) Inertia
B) Force
C) Reaction
D) Acceleration
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