F2 - SEM2 - Force and motion - 11.1 Motion

Question 1

What does the speed tell us?

Answer 1

Tell us how fast an object moves

Question 2

T or F

The higher the speed, the short the distance travelled in the same period of time

Answer 2

False
The higher the speed, the longer distance travelled in the same period of time

Question 3

What is the relationship between distance, time and average speed?

Answer 3

average speed = distance / time. OR

distance = average speed X time. OR

time = distance / average speed

Question 4

What is the speed of the each animals below?

Usain Bolt
Cheetah
Sloth

Answer 4

Usain Bolt - 12.4 m/s
Cheetah - 30 m/s, fastest animal on land
Sloth - 0.03 m/s on the ground

Question 5

What does distance-time graph record?

Answer 5

record the distance that an object travelled at different moments in time

*** study the distance-time graph on p.147 - 151

Question 6

T or F
In a distance-time graph, the steeper the line, the lower the average speed

Answer 6

False
In a distance-time graph, the steeper the line, the higher the average speed

Question 7

T or F

In a distance-time graph, a horizontal line show the object is moving at constant speed

Answer 7

False

In a distance-time graph, a horizontal line show the object is at rest (average speed is zero, not moving)

Question 8

What is uniform motion?
How can we tell if the object is in uniform motion by distance-time graph?

Answer 8

object moves at constant speed in one direction
the distance-time graph of an object is a straight line

Question 9

What is non-uniform motion?

Answer 9

object does not move in constant speed OR not in one direction