P2.1.1 - Distance, Time And Speed

Question 1

What is a good way of measuring very short periods of time?

Answer 1

Light gates

Question 2

Why is it difficult to measure very small or very large distances?

Answer 2

You need certain equipment

Question 3

What is ultrasound?

Answer 3

High-frequency sound waves

Question 4

How do you use ultra sound to measure distance?

Answer 4

The device measures the amount of time taken for a pulse to travel there and back.
It uses this value and calculates the speed of the value to calculate the distance.

Question 5

Name all the equipment needed in order to measure distance using ultrasound.

Answer 5

Motion sensor
Object being measured
Interface
(Sometimes a newton meter)

Question 6

What is the equation for average speed?

Answer 6

Average speed (m/s) =

Total distance (m)
—————————
Total time (s)

Question 7

What is the equation for distance travelled?

Answer 7

Distance travelled (m) =

Speed(m/s) X time(s)

Question 9

What is a generic object used to measure time?

Answer 9

Stopwatch

Question 10

Why can stopwatches be inaccurate?

Answer 10

Reaction speed

Question 11

How many meters are in a mile?

Answer 11

1609

Question 12

How do you convert speed?

Answer 12

You convert 1 distance into the other and you convert 1 speed into the other