Vectors and Equations of Motion Flashcards
What is a scalar quantity?
Has magnitude only, eg. speed.
What is a vector quantity?
Has magnitude and direction, eg. velocity.
What are vectors usually represented by?
Arrows, size of the arrow depicts the magnitude of the vector.
What happens to vectors in a straight line?
They are added algebraically.
How do we find the resultant force of two forces that are not in the same straight line?
Parallelogram of force.
What direction would the resultant force be in if the two forces were at a right angle?
Diagonally, the parallelogram would be a rectangle, using Pythagoras theorem to find the size of the resultant force and we can calculate the angle by trigonometry.
When an object is thrown up in the air what happens to its speed?
It decelerates at 10m/s^2 because gravity is acting in the opposite direction. At the top of its ascent its velocity would be 0.
