P8.1.1 - Everyday Motion

Question 1

What do you use to measure a 100m sprinter?

Answer 1

Electronic timing / measuring tape / trundle wheel

Question 2

Describe how electric timing works.

Answer 2

Starts with a pressure sensor, then a laser beam which breaks when you run through it

Question 3

What do you use to measure the speed of a car?

Answer 3

Speed camera / speed gun (LIDAR)

Question 4

How does a speed camera work?

Answer 4

Use 2 pictures and calculate how quick the car moved from one picture to another picture

Question 5

Explain how a speed gun works.

Answer 5

Find the difference between the time pulses reflected

Question 6

How would you measure the speed of a cyclist?

Answer 6

Wheel diameter (magnetic sensor detects every rotation)

Question 7

How does satellite navigation work?

Answer 7

Comparing your distance to 3 different satellites and then using an electronic data

Question 8

What is the speed of sound?

Answer 8

330m/s, 738mph