11.1 motion

Question 1

Speed
(unit)

Answer 1

Describes how fast an object moves.
Distance travelled by the object per unit time.
(m s⁻¹ / km s⁻¹)

Question 2

Distance-time graph?

Answer 2

Shows the distance that an object has travelled at different times.
Represents the motion of an object.

Question 3

DT graph: Straight slope

Answer 3

The object moves at a steady speed

Question 4

DT graph: Straight horizontal line

Answer 4

The object is at rest

Question 5

DT graph: straight slope, horizontal line, straight slope

Answer 5

The object moves at a steady speed,
then comes to rest,
finally moves at a steady speed.

Question 6

DT graph: curve dip upward

Answer 6

The object moves at an increasing speed. It is in non-uniform motion

Question 7

DT graph: curve bulb upward

Answer 7

The object moves at a decreasing speed. It is in non-uniform motion.

Question 8

Air track and glider experiment

Answer 8

1. Motion sensor connected to computer and data-logger
2. Switch on air pump
3. Give glider a short, gentle push – moves at a steady speed at a longer distance

Question 9

Uniform motion…

Answer 9

At a constant speed and fixed direction

Question 10

Non-uniform motion

Answer 10

Changing speed or changing direction

Question 11

Describing motion – format

Answer 11

When xx is moving along AB, it is in ___ motion as its speed ___ or/and direction___