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.
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