- #1
CathyLou
- 173
- 1
Hi.
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
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