Physics 20 - Dynamics vocab

Question 1

Law of inertia

Answer 1

Inertia is the tendency of an object to remain in its current motion. If the object is at rest, it tends to remain at rest. If an object is in motion, it tends to remain in motion. Further, the inertia of an object is proportional to its mass.

Question 2

Newton’s first law

Answer 2

Every object continues in a state of rest or uniform motion unless acted on by an unbalanced force.

Question 3

Newton’s second law

Answer 3

If an object is subjected to an unbalanced net force, it will accelerate in the direction of the net force:

Question 4

Newton’s third law

Answer 4

Whenever one object exerts a force on a second object, the second exerts an equal and opposite force on the first.