QCM : Fundamentals of Force and Motion — 5 questions

Explication

Newton's First Law describes the natural tendency of objects to maintain their current state of rest or uniform motion, emphasizing inertia. The Second Law provides a quantitative formula, F=ma, explaining how forces cause acceleration, thus focusing on the cause-and-effect relationship in motion changes.

Explication

Isaac Newton formulated the fundamental laws of motion, including the First and Second Laws, which are essential to understanding the relationships between force, motion, and energy in physics.

Explication

Newton's laws are traditionally presented in the order: First, Second, then Third. The First Law introduces inertia, the Second Law relates force, mass, and acceleration, and the Third Law describes action-reaction pairs. This sequence reflects the logical and historical development of Newton's understanding of motion.

Explication

The gravitational force directly increases the weight of the object when in a stronger gravitational field. Since frictional force (both static and kinetic) depends on the normal force (which is the weight in this case), an increase in gravity leads to an increase in the frictional force opposing the motion. Therefore, more force would be needed to slide the object, making option 2 correct.

Explication

Displacement differs from distance because it includes direction, making it a vector quantity, meaning it has both magnitude and direction. Distance measures the total path traveled regardless of direction, while displacement specifies the shortest straight-line distance and direction from start to end.