# Distance-Time Graphs

11SCI - Mechanics

2020

## Distance-Time Graphs

• We can plot a graph with time on the x-axis and distance on the y-axis to help us visualise data.
• Distance-time graphs tell us about the velocity of the object!

## Interpreting Distance-Time Graphs

• Positive gradient: Moving away
• Flat gradient: Stationary
• Negative gradient: Moving towards

## Interpreting Distance-Time Graphs

In pairs, describe the velocity of the object at A, B, C, D and E?

## Calculating Velocity From Graphs

\begin{aligned} & v = \text{ gradient} \\ & v = \frac{rise}{run} \\ & v = \frac{\Delta d}{\Delta t} = \frac{d_{f} - d_{i}}{t_{f} - t_{i}} \end{aligned}

## Question

In pairs, calculate the velocity of the object at A, B, C, D and E? Make sure you show working.

## Mahi Kāinga

Due Today Due Monday August 31st
Q2, Q3, Q1 Q5, Q6
Come show me! A5 tomorrow if you need help (or ask me in class)
Those without mahi kāinga, A5 tomorrow lunch time to do it! Answer all questions in your exercise book