Flashcards
P4
Cards in this deck (24)
- 1What is the formula to calculate the speed of an object?Speed = Distance/Time
- 2What is velocity?It is the speed of an object in a certain direction
- 3What is Displacement?Displacement is the distance of an object moved in a specific direction.
e.g. When you run around a circuit you run 400m but your displacement is zero because you finished where you started of. - 4What is the formula to calculate velocity?Average velocity = displacement / time taken
- 5In distance time graphs, what goes on the x-axis (horizontal) and what goes on the y-axis (vertical)?
- 6What does a straight line on a distance time graph mean?That the object is travelling at a steady speed?
- 7What does a horizontal line on a distance time graph mean?It means that the vehicle is stationary, or has stopped, and that the speed is zero.
- 8In a distance time graph the gradient of a line is equal to what?The speed of the object
- 9What does a steeper gradient on the distance time graph mean?It means the object has a faster speed
- 10What does a curved line on a distance time graph mean?That the speed is changing
- 11If a curved line on a distance time graph is getting steeper , what does it mean?It means the vehicles speed is increasing.
If the curve was getting lower it means the speed is decreasing. - 12In a displacement time graph when the object has returned to its starting point what will the displacement be?The displacement will be zero
- 13If an object travelled behind its starting point what would the displacement be on a displacement time graph?The displacement would be negative
- 14What is acceleration?Acceleration is the rate at which the speed of an object increases
- 15What is the formula for acceleration?Acceleration (m/s^2)= Change in speed/ time taken
- 16If an object slows down what type of acceleration does it have?Negative acceleration
Another word for this is deceleration - 17What does a speed time graph show?The changes in speed during a journey
- 18In a speed time graph what goes on the y-axis (vertical) and the x-axis (horizontal)?Speed on the y-axis and time on the x-axis
- 19What does a horizontal line on a speed time graph mean?That the object is travelling at a steady speed
- 20If a there is a horizontal line on the x-axis of a speed time graph what does it mean?It means that the object is stationary, or has stopped.
- 21What does a straight line going up on a speed time graph show?It shows acceleration
- 22What does a straight line going down on a speed time graph show?It shows deceleration
- 23The steeper the line on a speed time graph....The greater the size of the acceleration
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