Dynamics

- 1. Dynamics is a branch of physics that deals with the study of forces and motion of objects. It encompasses the analysis of how objects move and interact with one another in response to various forces. Understanding dynamics is essential in predicting the behavior of systems, such as mechanical systems, celestial bodies, and fluid flow. By studying dynamics, we can comprehend the underlying principles that govern motion and develop solutions to complex problems in engineering, science, and everyday life.
What is the SI unit for force?
A) Pascal B) Joule C) Watt D) Newton - 2. What is the relationship between acceleration and force?
A) Acceleration is inversely proportional to the net force acting on an object and directly proportional to its mass. B) Acceleration is directly proportional to both mass and force. C) Acceleration is directly proportional to the net force acting on an object and inversely proportional to its mass. D) Acceleration is inversely proportional to both mass and force. - 3. What is the acceleration of a freely falling object due to gravity near Earth's surface?
A) 1.96 m/s ^{2}B) 5.12 m/s ^{2}C) 15.37 m/s ^{2}D) 9.81 m/s ^{2}- 4. Which statement best describes Newton's third law of motion?
A) The work done on an object is equal to the change in its kinetic energy. B) For every action, there is an equal and opposite reaction. C) An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by an external force. D) The force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. - 5. Which law of thermodynamics states that the total entropy of an isolated system can never decrease over time?
A) Second law of thermodynamics B) Third law of thermodynamics C) Zeroth law of thermodynamics D) First law of thermodynamics - 6. What is the relationship between impulse and momentum change?
A) Impulse is equal to the force acting on an object divided by the time interval over which the force acts. B) Impulse is equal to the velocity of an object multiplied by its mass. C) Impulse is equal to the change in momentum of an object. D) Impulse is equal to the area under a force-time graph. - 7. Which of the following is NOT a conservative force?
A) Spring force B) Gravity C) Electric force D) Friction - 8. What is inertia?
A) The external force required to keep an object moving at a constant velocity. B) The tendency of an object to resist changes in its state of motion. C) The tendency of an object to accelerate when a force is applied. D) The force that resists the relative motion or tendency to move between two surfaces in contact. - 9. Which term refers to the resistance of an object to change its rotational motion?
A) Moment of inertia B) Angular velocity C) Angular momentum D) Torque |

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