SP1 Motion Flashcards
What is a vector quantity?
One that has magnitude (size) and a specific direction.
What is a scalar quantity?
one that has magnitude (size) but no specific direction. i.e. mass
What is velocity?
Velocity is speed in a stated direction. Velocity is a vector, speed is a scalar.
What is velocity measured in?
metres per second m/s
Is force a vector or a scalar?
vector
What is the unit of force?
Newtons
What is the formula for (average) speed?
(average) speed = distance / time
What is the formula for gradient?
gradient = change in y / change in x
How do you find speed on a distance-time graph?
find the gradient
What is the formula for acceleration?
acceleration = change in velocity / time
What is acceleration measured in?
m/sā2ā (metres per second squared)
Is acceleration a vector or a scalar?
vector
direction is taken into account i.e. - acceleration means backwards
What does v stand for in the acceleration equation?
v - final velocity
What does u stand for in the acceleration equation?
u - initial velocity
On a velocity-time graph the steeper the gradient the greater the _ _ _ _ _ _ _ _ _ .
acceleration
How do you find acceleration on a velocity-time graph?
find the gradient
What is the formula for area of a rectangle?
base x height
What is the formula for the area of a triangle?
1/2 base x height
How do you find distance travelled on a velocity-time graph?
Find the area between the graph line and the time axis
How do you use light gates determine the speed of an object?
first measure the length of the object that passes through the gate. Take the time recorded by the light gate. Use the formula speed = distance/time
