Grade 11 physics definitions Chapter 5 Newton's Laws

Question 0

Newton’s First Law

Answer 0

A body will continue in a state of rest or uniform motion in a straight line unless acted upon by a resultant force.

Question 1

Inertia

Answer 1

a property of matter which maintains an object’s state of rest or its constant motion in a straight line.

Question 2

Newton’s second law

Answer 2

When a resultant force is applied to an object, the acceleration is directly proportional to the resultant force and inversely proportional to the mass of the object.
OR
the rate of change of momentum of a body is directly proportional to the resultant force applied and in the same direction as this resultant force.

Question 3

Momentum

Answer 3

The momentum of a body is the product of its mass and its velocity. It is a vector quantity and has both magnitude and direction.

Question 4

Newtons Third Law

Answer 4

If a body A exerts a force on body B, then body B will exert a force that i equal in magnitude but opposite in direction on body A.

Question 5

Newtons Universal gravitational law

Answer 5

Every particle in the universe exerts a gravitational attraction on every other particle in the universe , and this force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.