Scalars and Vectors
Scalars only have magnitude (size).
Vectors have magnitude and direction.
Adding vectors involves pythagoras and trigonometry.
Adding two or more vectors is called finding the resultant of them.
1) Explain the difference between a scalar quantity and a vector quantity.
2) Jemima has gone for a swin in a river which is flowing at 0.35m/s. She swims at 0.18m/s at right angles to the current. Show that her resultant velocity is 0.39m/s at an angle of 27.2 degrees to the current.
3) Jemima is pulling on her lead with a force of 40N at an angle of 26 degree below the horizontal. Show that the horizontal component of this force is about 36N.