Kinematics Flashcards
What is Speed?
Distance travelled per unit time
What is Average Speed?
Total distance travelled per unit time
What is Instantaneous Speed?
Speed of an object at a particular instant
What is Uniform Speed?
Change in distance travelled by object per unit time is the same
What is Velocity?
Rate of change of displacement
What is Acceleration?
Rate of change of velocity, occurs when speed/direction changes
What is Uniform Acceleration?
Change in velocity of object per unit time is the same
What is Non-Uniform Acceleration?
Change in velocity of object per unit time isn’t the same
Equations for kinematics
1) a = (v-u) / t
2) s = 1⁄2 (u +v) t
3) s = ut + 1⁄2 at²
4) v²-u²= 2as
What can be found from the Gradient of Displacement-Time Graph?
Gradient of Displacement-Time graph gives the Velocity
Gradient of object at rest (Displacement-Time Graph)
Zero gradient
Gradient of object with Uniform Velocity (Displacement-Time Graph)
Constant gradient
Gradient of object with Non-Uniform Increase of Velocity (Displacement-Time Graph)
Increasing gradient
Gradient of object with Non-Uniform Decrease of Velocity (Displacement-Time Graph)
Decreasing gradient
What can be found from the Gradient of Velocity-Time Graph?
Gradient of velocity-time graph gives the acceleration
Gradient of object at rest (Velocity-Time Graph)
Zero gradient at zero m/s
Gradient of object with Uniform Velocity (Velocity-Time Graph)
Zero gradient at 10 m/s
Gradient of object with Uniform Acceleration (Velocity-Time Graph)
Positive and constant gradient
Gradient of object with Uniform Deceleration (Velocity-Time Graph)
Negative and constant gradient
Gradient of object with Increasing Acceleration (Velocity-Time Graph)
Positive and increasing gradient
Gradient of object with Decreasing Acceleration (Velocity-Time Graph)
Positive and decreasing gradient
What can be found from the area under the Velocity-Time Graph?
Displacement
What should be done of values are given in a graph?
Use the values in answer
What changes the acceleration that objects fall at?
All objects fall at same acceleration regardless of mass/size
When does Free Fall occur?
Free fall occurs when gravity is only force acting on object
What is the Acceleration of an object due to Free Fall?
10m/s²
