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28)

Izzy runs an 80-metre race in 14 seconds.

- During the first 6 seconds her speed increases at a constant rate.
- During the last 8 seconds her speed increases at a different constant rate.
- Her speed at 14 seconds is 2 m/s more than her speed at 6 seconds.

Here is a sketch of her speed-time graph.

a)

Work out her acceleration during the last 8 seconds.

State the units of your answer.

Work out her acceleration during the last 8 seconds.

State the units of your answer.

**[2 marks]**

b) When Izzy finishes the 80-metre race, her speed is v m/s

Work out the value of v.

**[4 marks]**