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Q28: Answers – Paper 2 – November 2018
Q28: Answers – Paper 2 – November 2018
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Izzy runs an 80-metre race in 14 seconds.
Here is a sketch of her speed-time graph.
- 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.
State the units of your answer.
b) When Izzy finishes the 80-metre race, her speed is v m/s
Work out the value of v.
Work out the value of v.
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28)
Izzy runs an 80-metre race in 14 seconds.
Here is a sketch of her speed-time graph.
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]