Ch 2 Kinematics
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Define speed.
The rate of change of distance.
Define velocity.
The rate of change of displacement.
Formula of average speed
Total distance / total time
Define acceleration.
The rate of change of velocity.
Formula of acceleration
a = (v-u) / t
What does the gradient of a speed-time graph mean?
acceleration
What does the gradient of a distance-time graph mean?
speed
What does the area under a speed-time graph mean?
distance moved by object
What is the value of the acceleration due to free fall on Earth? (include units)
10 m/s2
How is acceleration related to deceleration?
a = -d E.g. If a = - 5 m/s2 then d = 5 m/s2
Describe the motion of this graph.
Constant acceleration
Describe the motion of this graph.
decreasing acceleration
Describe the motion of this graph.
increasing acceleration
Describe the motion of this graph.
constant deceleration
Describe the motion of this graph.
constant velocity
Describe the motion of this graph.
not moving / zero speed / at rest
Describe the motion of this graph.
constant speed
Describe the motion of this graph.
object decelerates / object speed decreasing (Note: You cannot tell if the acceleration is constant, increasing or decreasing from this graph)
Describe the motion of this graph.
decreasing deceleration