SS 2 Physics 3rd Test

- 1. 1. Which principle states that for a body to be in equilibrium, the sum of the clockwise moments about any point must be equal to the sum of the anticlockwise moments?
A) Principle of Equilibrium B) Newton's Second Law C) Principle of Moment D) Newton's First Law - 2. 2. Which condition must be satisfied for a rigid body to be in equilibrium under the action of parallel forces?
A) The sum of the moments must be zero. B) The sum of the forces must be zero. C) The sum of the forces and moments must be non-zero. D) The sum of the forces and moments must be zero. - 3. 3. According to Newton's First Law of Motion, an object will remain at rest or continue to move at a constant velocity unless acted upon by a(n):
A) Balanced force B) Unbalanced force C) Internal force D) External force - 4. 4. Which term refers to a pair of forces that have equal magnitudes, opposite directions, and act along different lines of action?
A) Equilibrium B) Moment C) Torque D) Couple - 5. 5. Which law states that the rate of change of momentum of an object is directly proportional to the net force applied to it and occurs in the direction of the force?
A) Newton's Second Law B) Newton's Law of Gravitation C) Newton's First Law D) Newton's Third Law - 6. 6. What is the term for the repetitive back-and-forth motion of an object about an equilibrium position?
A) Damping B) Simple Harmonic Motion C) Forced Vibration D) Resonance - 7. 7. What is the term for the phenomenon that occurs when an external force is applied to an object at its natural frequency, causing a large amplitude vibration?
A) Damping B) Simple Harmonic Motion C) Forced Vibration D) Resonance - 8. 8. __________ is the amount of heat energy required per unit mass to raise the temperature of a substance by 1 degree celsius.
A) Specific Heat Capacity B) Heat Capacity C) Latent Heat D) Thermal Conductivity - 9. 9. Which method is commonly used to determine the specific heat capacity of a substance?
A) Radiometry B) Spectroscopy C) Thermodynamics D) Calorimetry - 10. 10. __________ is the formula to calculate the heat energy transferred to a substance?
A) QT = mcv B) Q∆T = mcv C) Q = mcΔT D) QT = mc∆v - 11. 11. Which law states that energy cannot be created or destroyed, only transferred or transformed from one form to another?
A) Law of Conservation of Angular Momentum B) Law of Conservation of Momentum C) Law of Conservation of Energy D) Law of Conservation of Mass - 12. 12.What is the term for the collision between two objects where the total kinetic energy before and after the collision remains constant?
A) d) Conservation Collision B) Inelastic Collision C) Perfectly Inelastic Collision D) Elastic Collision - 13. 13. The force that opposes the motion of an object in simple harmonic motion is called the __________
A) Damping force B) Density force C) Frequency force D) Net force - 14. 14. Which law of motion states that for every action, there is an equal and opposite reaction?
A) Newton's Third Law B) Newton's First Law C) Newton's Second Law D) Law of Inertia - 15. 15. The conservation of linear momentum holds true:
A) In all collisions B) Only in explosions C) Only in elastic collisions D) Only in inelastic collisions - 16. 16. The SI unit of heat energy is:
A) Joules B) Newtons C) Watts D) Calories - 17. 17. Find the quantity of heat required to raise the temperature of 500g of copper from 16⁰C to 116⁰C [ assuming that the specific heat capacity of copper = 400J/kg].
A) 20kJ B) 400kJ C) 24kJ D) 2kJ - 18. 18. The maximum displacement from the equilibrium (central) point is the _____
A) Vibration B) Period C) Amplitude D) Frequency - 19. 19. Which of the following equations is for when two bodies move in the same direction before and after collision
A) m _{1} u_{1} + m_{2} u_{2} = m_{1}v_{1} - m_{2}v_{2}B) m _{1} u_{1} - m_{2} u_{2} = m_{1}v_{1} + m_{2}v_{2}C) m _{1} u_{1} - m_{2} u_{2} = m_{1}v_{1} - m_{2}v_{2}D) m _{1} u_{1} + m_{2} u_{2} = m_{1}v_{1} + m_{2}v_{2}- 20. 20. A force acting on a body causes a change in the momentum of the body from 12kgms
^{-1}to 16kgms^{-1}in 0.2s. Calculate the magnitude of the impulse.
A) 36Ns B) 0.8Ns C) 4.0Ns D) 28.0Ns - 21. 21. The property of a body to remain at rest or to continue in a uniform motion in a straight line is called __________
A) Inertia B) Momentum C) Energy D) Impulse - 22. 22. __________ is the inward force required to keep an object moving with a constant speed in a circular path.
A) Oscillation force B) Centrifugal force C) Angular force D) Centripetal force - 23. 23. The frequency of a simple harmonic motion refers to the:
A) Rate of change of displacement B) Number of cycles per unit time C) Time taken for one complete cycle D) Maximum displacement - 24. 24. _______ is the SI unit of force
A) Newton B) Celsius C) Joule D) Kelvin - 25. 25. The to and fro motion of a ball passed repeatedly between two footballers is _______
A) All of the above B) Not a Simple harmonic motion C) A simple harmonic motion D) Partially a simple harmonic motion - 26. 26. 360⁰ = _____rad
A) 2π B) 2π ^{2}C) √2π D) 1/2π - 27. 27. The quantity of heat required to raise the temperature of the whole of a substance through 1K is _____
A) Thermal energy B) Heat Capacity C) Thermal Conductivity D) Specific Heat Capacity - 28. 28. _______ is a single force acting alone, which will have the same effect in magnitude and direction as those forces acting together.
A) Recurring force B) Restoring force C) Resultant force D) Equilibrant - 29. 29. The turning effect produced by a force is known as the _______
A) Vertical component of a force B) Principle of force C) Moment of force D) Equilibrium of a force - 30. 30. Turning of a tap with our fingers is an application of a _____
A) Force B) Circular Motion C) Velocity D) Couple |

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