Distance-Time And Displacement-Time Graphs

Question 1

Is distance scalar?

Answer 1

Yes

Question 2

Is displacement scalar?

Answer 2

No

Question 3

What is distance?

Answer 3

Distance is just how far an object has moved. It cannot decrease.

Question 4

What is displacement?

Answer 4

Displacement is how far an object has travelled in a certain direction.

Question 5

Draw the Earth’s orbit of the Sun as a distance-time graph

Answer 5

N/a

Question 6

Draw the Earth’s orbit of the Sun as a displacement-time graph

Answer 6

N/a

Question 7

Gradient formula

Answer 7

Change in y / Change in x

Question 8

How to find the gradient of a straight line?

Answer 8

Use the line

Question 9

How to find the gradient of a curve?

Answer 9

Draw a tangent, and find the gradient

Question 10

What is speed?

Answer 10

Speed is just how far you are going. It is the rate of motion.

Question 11

What is velocity?

Answer 11

Velocity is speed in a given direction

Question 12

Distance formula

Answer 12

Distance travelled (m) = average speed (m/s) x time (s)

Question 13

How to measure distance and time?

Answer 13

1. Light gates (for short time intervals)
2. Rolling tape measure and marker (walking speed)
3. Video

Question 14

Independent variable

Answer 14

Variable that is manipulated

Question 15

Dependent variable

Answer 15

Variable that is measured

Question 16

Control variable

Answer 16

Variable that stays the same

Question 17

Velocity experiment

Answer 17

1. Person A holds the stick
2. Person B holds the stop watch / iPad in stopwatch mode
3. Person C records a video with an iPad carefully (follow the bubble!)
4. Person D fills in the table afterwards, think carefully how you measure the distance. If you are waiting for results, have a think why the bubbles move differently.
5. Tip the stick and start the clock when the bubble is at the bottom.
6. As the bubble rises, record the position of the bottom of the bubble every second.
7. Swap over so everyone does 3 different activities.