Flashcards
Motion, AQA Chapter 9
Flashcards do conjunto (18)
- 1How do you calculate speed for an object that is moving at a constant speed?The speed of an object is: v = s/t
speed,v(metres per second,m/s) =
distance travelled,s(metres,m)/
time taken,t(seconds,s) - 2How do you use a distance-time graph to determine whether an object is stationary or moving at a constant speed?The distance time graph for an object that is:
•stationary, is a horizontal line
•moving at a constant speed, is a straight line that slopes upwards. - 3What does the gradient of the line on a distance-time graph tell you?The gradient of a distance-time graph for an object represents the object's speed.
- 4How do you rearrange the equation for constant speed?v=s/t can be rearranged to give
•s=v t
•t=s/v - 5What is the difference between speed and velocity?Velocity is speed in a given direction.
- 6What is a vector and a scalar?A vector is a physical quantity that has a direction as well as a magnitude.
A scalar is a physical quantity that has a magnitude only and does not have a direction. - 7How to calculate the acceleration of an object?The acceleration of an object is a=△v/t
acceleration,a(metres per second squared,m/s)=
change in velocity,△v(metres per second,m/s)/
time taken for the change,t(seconds,s) - 8What is deceleration?Deceleration is the change of velocity per second when an object slows down.
The term deceleration or negative acceleration is used for any situation where an object slows down. - 9How do you measure velocity changes?A motion sensor linked to a computer can be used to measure velocity changes.
- 10What does the gradient on the line of a velocity-time graph represent?The gradient of the line on a velocity-time graph represents acceleration.
- 11What the horizontal line on a velocity-time graph tells you?If a velocity-time graph is a horizontal line, the acceleration is zero.
- 12How do you use a velocity-time graph to work out whether an object is accelerating or decreasing?A positive gradient on a velocity-time graph represents positive acceleration, a negative gradient represents deceleration.
- 13What the area under a velocity-time graph tells you?The area under the line on a velocity-time graph represents distance travelled.
- 14What is given by the gradient of the line on its distance-time graph?The speed of an object moving at a constant speed is given by the gradient of the line on its distance-time graph.
- 15What is given by the gradient of the line on its velocity-time graph?The acceleration of an object is given by the gradient of the line on its velocity-time graph.
- 16How to calculate speed from a distance-time graph where the speed is constant?The speed of an object moving at constant speed is given by the gradient of the line on its distance-time graph.
- 17How to calculate speed from a distance time graph where the speed is changing?The speed, at any instant in time, of an object moving at changing speed is given by the gradient of the tangent to the line on its distance-time graph.
- 18How to work out the gradient of the line using the height of the triangle and the base of the triangle?The gradient of the line =
the height of the triangle/
the base of the triangle
Informações
- Descrição
- Year 9 Physics FlashCards sobre Motion, AQA Chapter 9, criado por Miles McIntosh em 30-10-2017.
- Criado por
- Miles McIntosh
- Visualizações
- 1
- Avaliação