Speed

Question 1

What is the difference between distance and displacement

Answer 1

Distance is a scalar quantity and only has a magnitude, displacement is a vector quantity and has both magnitude and direction

Question 2

What’s the difference between speed and velocity

Answer 2

Speed is a scalar quantity and only has a magnitude (size) velocity is a vector quantity and has both magnitude and direction

Question 3

What factors can affect the speed at which someone walks, runs and cycles

Answer 3

Age,fitness,terrain,and distance travelled

Question 4

What are typical speeds of a car and train

Answer 4

13-30m/s and 50 m/s respectively

Question 5

What’s a typical speed for sound traveling in air

Answer 5

330 m/s

Question 6

What is acceleration

Answer 6

Change in velocity of an object per second

Question 7

What unit of acceleration

Answer 7

M/s2

Question 8

How can an object be accelerating even if it’s traveling at a steady speed

Answer 8

If it’s changing direction

Question 9

What is happening to an object if it has a negative acceleration

Answer 9

It is slowing down

Question 10

What information does the gradient of the line in a velocity line graph provide

Answer 10

Speed

Question 11

What information does the gradient of the line in a velocity time graph

Answer 11

Calculate the area under the graph

Question 12

What is the acceleration of a free falling object due to gravity

Answer 12

~9.8m/s squared

Question 13

What is the general name for the frictional forces an object experiences when moving through a fluid (liquid or gas)

Answer 13

Drag

Question 14

In which direction does the drag on an object always act

Answer 14

In the direction opposite to which it is moving

Question 15

What happens to the drag on an object as its speed increases

Answer 15

The drag increases

Question 16

What can be done to reduce the drag on an object

Answer 16

Streamlining