- 1. Particle mechanics is a branch of classical mechanics that deals with the motion of particles in a system without considering the forces acting on them. Instead of analyzing the individual forces, particle mechanics focuses on the overall motion of the particles in the system. It involves studying the position, velocity, and acceleration of particles in order to predict their future motion. Particle mechanics is fundamental in understanding the behavior of objects at a microscopic level and is essential in various fields such as physics, engineering, and astronomy.
Which of the following is a unit of force?
A) Hertz
B) Newton
C) Ohm
D) Volt
- 2. What quantity is defined as the resistance to motion when two surfaces are in contact?
A) Inertia
B) Friction
C) Velocity
D) Acceleration
- 3. Newton's second law of motion states that force is equal to:
A) Mass plus acceleration
B) Mass times acceleration
C) Mass minus acceleration
D) Mass divided by acceleration
- 4. Which of the following is a scalar quantity?
A) Velocity
B) Mass
C) Force
D) Acceleration
- 5. In a collision between objects, momentum is:
A) Transformed into energy
B) Increased
C) Conserved
D) Lost
- 6. When an object is at rest, the net force acting on it is:
A) Negative
B) Positive
C) Infinite
D) Zero
- 7. The acceleration due to gravity on Earth is approximately:
A) 12.45 m/s2
B) 5.67 m/s2
C) 9.81 m/s2
D) 1.62 m/s2
- 8. Which of the following best represents Newton's first law of motion?
A) Force is equal to mass times acceleration
B) For every action, there is an equal and opposite reaction
C) An object in motion stays in motion unless acted upon by an external force
D) Acceleration is inversely proportional to mass
- 9. The work done by a force is calculated as the force multiplied by:
A) The displacement in the direction of the force
B) The time the force is applied
C) The initial velocity of the object
D) The final kinetic energy of the object
- 10. The point in a rotating system where all the system's mass can be considered to be concentrated is known as the:
A) Axis of rotation
B) Center of mass
C) Stable equilibrium point
D) Pivot point
- 11. Which of the following is a measure of the resistance to rotational motion?
A) Torque
B) Centripetal force
C) Angular velocity
D) Moment of inertia
- 12. A body moving in a circular path at constant speed experiences:
A) Centripetal acceleration
B) Tangential acceleration
C) Radial acceleration
D) Angular acceleration
- 13. What is the relationship between force and pressure?
A) Pressure is force divided by area
B) Pressure is force per unit area
C) Force is pressure multiplied by area
D) Force and pressure are unrelated
- 14. The term 'momentum' is defined as the product of an object's:
A) Mass and velocity
B) Mass and acceleration
C) Force and distance
D) Velocity and time
- 15. Which of the following is a result of applying a force to an object over a distance?
A) Velocity
B) Work
C) Energy
D) Power
- 16. The ratio of an object's density to the density of water is known as its:
A) Specific gravity
B) Viscosity
C) Pressure
D) Volume
- 17. What term describes a force that keeps an object moving in a circle?
A) Centrifugal force
B) Tangential force
C) Gravity force
D) Centripetal force
- 18. A push or pull on an object is defined as:
A) Work
B) Power
C) Force
D) Energy
- 19. Which of the following laws relates the volume of a gas to its pressure and temperature?
A) Ohm's Law
B) Boyle's Law
C) Newton's Third Law
D) Hooke's Law
- 20. What term is used to describe the force that allows an object to float in a fluid?
A) Gravity
B) Buoyancy
C) Friction
D) Tension
- 21. A mass of 2 kg is pulled with a force of 10 N. What is the resulting acceleration?
A) 25 m/s2
B) 5 m/s2
C) 15 m/s2
D) 20 m/s2
- 22. At what angle does an object experience maximum projectile range when launched from the ground?
A) 60 degrees
B) 90 degrees
C) 45 degrees
D) 30 degrees
- 23. Which principle states 'work done is equal to the change in kinetic energy'?
A) Work-Energy Principle
B) Newton's Second Law
C) Hooke's Law
D) Conservation of Energy
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