- 1. Newtonian dynamics, formulated by Sir Isaac Newton in his seminal work 'Philosophiæ Naturalis Principia Mathematica' in 1687, is a fundamental branch of classical physics that describes the motion of objects based on classical mechanics. This theory, also known as Newton's laws of motion, establishes the relationship between an object's motion and the forces acting upon it. Newtonian dynamics consists of three fundamental principles: 1. The first law states that an object will remain at rest or in uniform motion unless acted upon by an external force. 2. The second law explains how the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This law is often summarized as F=ma, where F is the force, m is the object's mass, and a is the acceleration. 3. The third law states that for every action, there is an equal and opposite reaction. These laws provide a framework for understanding and predicting the motion of objects in a wide range of real-world scenarios, from the motion of planets in the solar system to the behavior of everyday objects. Newtonian dynamics has played a crucial role in the development of modern physics and continues to be a cornerstone of classical mechanics.
According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by?
A) Gravity
B) An external force
C) Velocity
D) Friction
- 2. Newton's second law states that the acceleration of an object is directly proportional to the net force applied and inversely proportional to the object's?
A) Density
B) Volume
C) Mass
D) Length
- 3. The action and reaction forces in Newton's third law of motion always occur?
A) In different time periods
B) In opposite directions
C) Without any effect
D) Simultaneously
- 4. What is the SI unit of force?
A) Newton
B) Joule
C) Watt
D) Pascal
- 5. What term is used to describe the resistance an object encounters as it moves through a fluid?
A) Lift
B) Thrust
C) Drag
D) Torque
- 6. The tendency of an object to resist any change in its motion is called?
A) Velocity
B) Momentum
C) Inertia
D) Acceleration
- 7. Which of Newton's laws of motion is also known as the law of inertia?
A) Newton's third law
B) Newton's first law
C) Newton's second law
D) Newton's law of gravitation
- 8. The product of mass and velocity of an object is known as?
A) Acceleration
B) Momentum
C) Inertia
D) Force
- 9. The gravitational force between two objects depends on their masses and the?
A) Velocity
B) Acceleration
C) Distance between them
D) Direction
- 10. What is the resistance force that occurs when one surface slides over another?
A) Friction
B) Gravity
C) Tension
D) Velocity
- 11. The acceleration of an object is directly proportional to the net force applied and inversely proportional to the object's mass according to?
A) Newton's first law
B) Law of universal gravitation
C) Newton's third law
D) Newton's second law
- 12. What law states that for every action, there is an equal and opposite reaction?
A) Newton's third law
B) Law of universal gravitation
C) Newton's second law
D) Newton's first law
- 13. What happens to the acceleration of an object if the net force acting on it increases?
A) Acceleration becomes negative
B) Acceleration decreases
C) Acceleration increases
D) Acceleration remains the same
- 14. If the net force acting on an object is zero, then the object will?
A) Decelerate
B) Remain at rest or in constant velocity
C) Change its direction
D) Increase its speed
- 15. What is the SI unit of mass?
A) Kilogram
B) Newton
C) Gram
D) Pound
- 16. An object in free fall will accelerate due to?
A) Inertia
B) Tension
C) Gravity
D) Friction
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