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level: Kinematics

Questions and Answers List

level questions: Kinematics

Question	Answer
How do you calculate average speed?	...................................Distance Average Speed = ---------------------- ........................................Time
Define Displacement	Distance moved by object in a particular direction
How do you calculate velocity?	Change in displacement ------------------------------ Time taken
How do you calculate change in displacement?	Velocity x Time taken
How do you calculate change in time?	Change in displacement --------------------------- velocity
The slope of a displacement-time graph tells us how fast an object is moving. The straight line shows............	The straight line shows that the object's velocity is constant
The slope of a displacement-time graph tell us how fast an object is moving. The slope shows which object is moving faster. The steeper the slope the...............	The steeper the slope the greater the velocity
The slope of a displacement-time graph tell us how fast an object is moving. When the slope of the graph is 0. What does this tell us?	- Displacement is not changing - Hence velocity =0 - Object is stationary
The slope of a displacement-time graph tell us how fast an object is moving. When the slope of the graph suddenly becomes negative, what does this mean?	The object is moving back the way it came
The slope of a distance-time graph tells us how fast an object is moving. The displacement-time graph is curved, what does this tell us?	- The slope is changing - Means object's velocity is changing
What is the formula for Subtraction of vectors?	A - B = A + ( - B )