SP1 Flashcards
(16 cards)
What measurements do we use for forces?
Newtons (N)
What do all forces have?
A magnitude and a direction.
What is a vector quantity?
A quantity that has both size and direction.
What is a scalar quantity?
A quantity that does not have a direction.
What are examples of vector quantities?
- Velocity
- Acceleration
- Momentum
- Forces
What are examples of scalar quantities?
- Distance
- Speed
- Energy
- Time
What is displacement?
The distance covered in a straight line.
What is acceleration?
A measure of how fast velocity is changing.
What is momentum?
A combination of mass and velocity.
How do we calculate the average speed?
distance (m)
Speed (m/s) = _______________
time taken (s)
What is a more accurate technique of measuring time than using a stopwatch?
Using light gates.
How do we find the speed in a distance/time graph?
It can be calculated from the gradient of the line.
How do we calculate acceleration?
change in velocity (m/s)
Acceleration (m/s²) = _________________________
time taken (s)
OR
v - u
a = ______
t
How are acceleration, initial velocity, final velocity and distance travelled related?
v² - u² = 2 × a × x
(x represents distance)
How do we find the speed in a velocity/time graph?
It can be calculated from the gradient of the line.
How do we find the distance an object has travelled using a velocity/time graph?
It can be calculated from the area under the graph.
