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Could someone please help me to do part (b) of the following question? I would really appreciate any help as I am really stuck.

A boy is walking at a constant speed of 1.8 m/s along a straight road. He passes a telephone booth where his sister is making a telephone call. His sister takes 30 s to complete the call and then sets off in pursuit of the boy. She accelerates uniformly from rest at 3 m/s^2 until she is running at a speed of 9 m/s. She maintains this constant speed until she reaches her brother.

(a) On the same diagram sketch the speed-time graphs for the boy and his sister.

I did this part.

(b) Calculate the time taken by the girl to reach her brother.

Thank you.

Cathy

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# Homework Help: M1 acceleration help

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