Mechanics 2 - Linear and Projectile Motion Flashcards
What is displacement and how is it different to distance?
Displacement is a measure of the line connecting the starting point to the finishing point.
Distance is a measure of the total length of the path travelled.
Also distance is a scalar and displacement is a vector.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/345/a_image_thumb.png?1632384411)
What does a straight line on a distance-time graph represent?
A constant speed.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/348/a_image_thumb.png?1632384652)
How is acceleration defined?
Acceleration is the rate of change of velocity.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/349/a_image_thumb.png?1632384729)
How is speed different to velocity?
Speed is the rate of change of distance.
Velocity is the rate of change of displacement.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/352/a_image_thumb.png?1632384859)
Describe the motion of this ball
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/354/q_image_thumb.png?1632385067)
Ball is moving to the right and speeding up.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/354/a_image_thumb.png?1632385110)
Decribe the motion of this ball.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/359/q_image_thumb.png?1632385202)
Ball is moving to the left and speeding up.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/359/a_image_thumb.png?1632385219)
Describe the motion of this ball.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/363/q_image_thumb.png?1632385273)
Ball is moving to the right and slowing down.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/363/a_image_thumb.png?1632385350)
Describe the motion of this ball.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/369/q_image_thumb.png?1632385403)
Ball is moving to the left but slowing down.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/369/a_image_thumb.png?1632385471)
Is the ball moving to the right?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/373/q_image_thumb.png?1632385596)
Only if the velocity vector is also acting to the right.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/373/a_image_thumb.png?1632385670)
What does a straight line on a displacement-time graph represent?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/376/q_image_thumb.png?1632386319)
A constant velocity.
What does a curve with an increasing gradient represent on a displacement-time graph?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/380/q_image_thumb.png?1632386494)
An increasing velocity (acceleration)
What does a curve with a decreasing gradient represent on a displacement-time graph?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/382/q_image_thumb.png?1632386585)
A decreasing velocity (decceleration)
What does a negative gradient on a displacement-time graph represent?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/385/q_image_thumb.png?1632386737)
A negative velocity (travelling back to where it started)
What does a straight line on a velocity-time graph represent?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/387/q_image_thumb.png?1632386881)
A constant acceleration.
What does a curve with an increasing gradient represent on a velocity-time graph?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/395/409/390/q_image_thumb.png?1632387109)
An increasing acceleration.