Question 2

2.1 A brother and sister walk home from school. After walking 500 m eastward,
the brother realises that he has left a book at school and he returns to school.
His sister continues walking another 800 m to their home. She arrives home
30 minutes after leaving school.

2.1.1 Define the term average speed. (2)

2.1.2 Calculate the average speed of the girl from school to her home. (3)

2.1.3 Use a vector scale diagram and represent the displacement of the
boy from the time he realised he had left his book at school until he
reached home. Include all the relevant information in the diagram

Use scale 1 cm = 100 m for the diagram. (3)

2.1.4 Calculate how long it would take the boy to reach home, from the time
they both left the school together if the average speed of the boy is
0,72 m.s-1 (4)

2.2 A girl travels around a circular path from point A to point B. The radius of the
circular path is 25 m.

Point B is directly east of point A.

Calculate the:

2.2.1 Distance travelled by the girl (3)

2.2.2 Displacement of the girl (2)

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