Space Flashcards
What is a scalar quantity?
A scalar is a quantity that has only size (magnitude)
What is a vector quantity?
A vector is a quantity that has a size (magnitude) and a direction.
What are the 5 Scalar Quantites? (size only)
Distance, Speed, Time, Mass, Energy
What are the 5 Vector Quantities? (size + direction)
displacement, velocity, acceleration, force, weight
What is distance?
How far something has travelled.
What is displacement?
The direct distance from start point to finish point in a stated direction.
What is Speed?
The distance travelled per unit of time.
What is velocity?
The displacement travelled per unit time
What must be stated for a Velocity?
A direction.
How do you find acceleration from a Velocity Time-Graph?
From the gradient of the line or a= v-u/t
How do you find displacement from a Velocity Time-Graph?
From the area under the line.
When finding the area under the line, what will areas below the X axis be?
Negative values.
Why do projectiles follow a curved path?
Because it has two parts to its motion: Constant Horizontal Velocity and Constant Vertical Acceleration.
What does the Horizontal Motion/Velocity do?
Remains constant (doesn’t increase with time)
What does the Vertical Motion/Velocity do?
Increases with time.
