Kinematics

Question 1

Scalar:

Answer 1

A physical quantity which has magnitude (size) only.

Question 2

Resultant vector:

Answer 2

The single vector which has the same effect as the original vectors acting
together.

Question 3

Distance:

Answer 3

Length of path travelled.

Question 4

Position:

Answer 4

A vector quantity that points from the reference point as the origin.

Question 5

Displacement:

Answer 5

A change in position. It is a vector that points from the initial to final position.

Question 6

Speed:

Answer 6

The rate of change of distance and know that speed is a scalar quantity

Question 7

Free fall

Answer 7

An object is in free fall if the only force acting on it is gravitational force.

Question 8

Gravitational acceleration

Answer 8

The acceleration an object will experience due to gravity. On Earth it has a constant value of 9,8 m.s-2 downwards.

Question 9

Terminal velocity –

Answer 9

The maximum velocity a falling body reaches when air resistance prevents it from accelerating further.