Mechanics Flashcards
What are Scalar Quantities?
A scalar quantity is any physical quantity that has only magnitude, but no direction.
What are some examples of Scalar Quantities?
Time, Temperature, Mass.
What are Vector Quantities?
A Vector quantity has both magnitude and direction.
What are some example of Vector quantites?
a force of 10N, a velcoty of 20-ms-1, etc.
What is the Parallelogram Law?
If 2 vector quantities acting at one point on the same object are represented in magnitude and direction by the sides of a parallelogram drawn from the pointy, their resultant is represented in both magnitude and direction by the diagonal of the parallelogram drawn from the point
What is Distance?
Distance is the quantity of space between two points or moved by an object.
What is Displacement?
Displacement is the distance moved in a stated direction.
What is speed?
Speed is the rate of change of distance (with respect to time).
What is Velocity?
Velocity is the rate of change of displacement (with respect to time).
What is Acceleration?
Acceleration is the rate of change of velocity (with respect to time).
What is Newton’s first law of motion?
A body at rest will stay at rest, and a body in motion will continue to travel at constant speed in a straight line, if no resultant force acts on it.
