P2.1 - Motion Flashcards
State the equation linking distance, speed and time. Give appropriate units.
Distance = Speed x Time
Distance (m), Speed (m/s), Time (s)
How can speed be calculated from a distance-time graph?
The speed is equal to the gradient of the graph.
What must be done to calculate speed at a given time from a distance-time graph for an accelerating object?
● Drawing a tangent to the curve at the required time.
● Calculating the gradient of the tangent.
State the equation for the average acceleration of an
object. Give appropriate units.
Acceleration = (Change in Velocity)/(Time Taken)
Acceleration (m/s²), Velocity (m/s), Time (s)
How can the distance travelled by an object be calculated from a velocity-time graph?
It is equal to the area under the graph.
What is a scalar quantity
A quantity that only has a magnitude
A quantity that isn’t direction dependant
What is a vector
A quantity that has a magnitude and direction
How are vectors drawn?
● As an arrow.
● The length of the arrow represents the magnitude.
● The arrow points in the associated direction.
Is force a scalar or a vector?
● Vector.
● It has both a magnitude and an associated direction.
Give three examples of vector quantities.
- Velocity
- Displacement
- Force
Give three examples of scalar quantities.
● Temperature ● Time ● Mass ● Speed ● Distance
How do you calculate average speed for non-uniform
motion?
Average Speed (m/s) = Change in Distance (m) / Change in Time (s)
What piece of apparatus may be used to record the time taken for a very fast object to move a given distance?
Light Gates
What is the equation of motion?
v2−u2=2aS
V= final velocity u = initial velocity a = acceleration S = Distance covered by object
What is the formula for kinetic energy?
0.5 x Mass x (Speed)^2