Kinematics 1&2 - Definitions

Question 1

Physical Quantity

Answer 1

A property of an object that can be measured with a measuring instrument

Question 2

Scaler Quantity

Answer 2

A physical quantity that has magnitude only

Question 3

Vector Quantity

Answer 3

A physical quantity that has both magnitude and direction

Question 4

Position (x)

Answer 4

An object’s location relative to a reference point

Question 5

Frame Of Reference

Answer 5

A reference point combined with a set of directions

Question 6

Rectilinear Motion

Answer 6

Motion along a straight line

Question 7

Distance (d) (a scaler quantity)

Answer 7

The length of path travelled

Question 8

Displacement (s) (a vector quantity)

Answer 8

A change in position

Question 9

Speed (v) (scaler)

Answer 9

The rate of change of distance (unit: m.s^-1 )

Question 10

Velocity (v) (vector)

Answer 10

The rate of change of position // the rate of displacement // the rate of change of displacement

Question 11

Instantaneous velocity

Answer 11

The velocity of an object at a precise moment

Question 12

Acceleration (a) (vector)

Answer 12

The rate of change of velocity