P11 Speed

Question 1

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

Answer 1

age, fitness, terrain and distance travelled

Question 2

What are typical speeds of a car?

Answer 2

13-30m/s

Question 3

What are typical speeds of a train?

Answer 3

50m/s

Question 4

What is the typical speed for sound travelling in air

Answer 4

330m/s

Question 5

How can an object be accelerating even if it is travelling at a steady speed

Answer 5

if it is changing direction

Question 6

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

Answer 6

it is slowing down

Question 7

What information does the gradient of a line in a distance-time graph provide

Answer 7

speed

Question 8

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

Answer 8

acceleration

Question 9

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

Answer 9

~ 9.8m/s

Question 10

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

Answer 10

drag

Question 11

In which direction does the drag on an object always act?

Answer 11

in the direction opposite to which it is moving