Vectors In Two Dimensions

Question 1

Definition of scalar

Answer 1

A physical quantity that has only magnitude

Question 2

Vector

Answer 2

A physical quantity that has magnitude and direction

Question 3

Friction force

Answer 3

The force that opposes the motion of an object and is parallel to the surface

Question 4

Normal force

Answer 4

The force or component of a force that a surface exerts on an object in contact with the surface, perpendicular to the the surface

Question 5

Static friction

Answer 5

The force that counteracts the tendency of movement of a stationary object relative to a surface

Question 6

Kinetic friction

Answer 6

The force that counteracts the tendency of movement of a moving object relative to a surface

Question 7

An object is in equilibrium if it:

Answer 7

Is at rest, also known as static equilibrium

OR

Moves at a constant velocity therefore has no acceleration. This is known as dynamic equilibrium

Question 8

Resultant vector

Answer 8

The resultant vector is the vector sum of all the vectors acting on the object.