David is driving a steady 21 ms when he passes tina who is, Ask an Expert

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Q. A certain copper wire has a resistance of 9.70. At what point along its length must the wire be cut so that the resistance of one piece is 8.0 times the resistance of the other?

Q. David is driving a steady 21.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.2 m/s^2 at the instant when David passes.

a. How far does Tina drive before passing David?

b. What is her speed as she passes him?

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