This law describes the relationship between an object's mass, acceleration, and the applied force.

This law describes the relationship between an object's mass, acceleration, and the applied force.

• A. Newton's First Law
• B. Newton's Second Law
• C. Newton's Third Law
• D. Law of Gravity

Answer: (B)

Mass, acceleration, and force are linked by Newton's Second Law: the net force acting on an object equals its mass times its acceleration (F = ma). This means how fast an object speeds up depends on both how hard you push (the force) and how heavy the object is (the mass). The acceleration points in the same direction as the net force, and larger mass requires more force to achieve the same acceleration. For example, pushing a light cart with a given push makes it accelerate more than a heavy cart, and doubling the push doubles the acceleration for the same cart. The units reflect this relationship: force is measured in newtons, where 1 newton is 1 kilogram meter per second squared. Other laws describe different ideas—Newton's First Law deals with motion when forces cancel out (inertia), Newton's Third Law covers equal and opposite action-reaction pairs, and the Law of Gravity explains attraction between masses.

Mass, acceleration, and force are linked by Newton's Second Law: the net force acting on an object equals its mass times its acceleration (F = ma). This means how fast an object speeds up depends on both how hard you push (the force) and how heavy the object is (the mass). The acceleration points in the same direction as the net force, and larger mass requires more force to achieve the same acceleration. For example, pushing a light cart with a given push makes it accelerate more than a heavy cart, and doubling the push doubles the acceleration for the same cart. The units reflect this relationship: force is measured in newtons, where 1 newton is 1 kilogram meter per second squared. Other laws describe different ideas—Newton's First Law deals with motion when forces cancel out (inertia), Newton's Third Law covers equal and opposite action-reaction pairs, and the Law of Gravity explains attraction between masses.