Motion Flashcards
(23 cards)
What is displacement?
The distance of an object from a point in a specific
direction (vector)
What is velocity?
Rate of change of displacement (vector quantity)
What is speed?
Change in distance travelled per unit time (scalar)
What is acceleration?
Rate of change of velocity (vector quantity)
What are the units of acceleration?
ms-2
What is meant by constant velocity/uniform motion?
Speed and direction of motion don’t change
What is represented by the gradient of a displacement-time graph?
Velocity
What is represented by the gradient of a velocity-time graph?
Acceleration
What is represented by the area under a velocity-time graph?
Change in displacement
What is represented by the area under an acceleration-time graph?
Change in velocity
When can the suvat equations by used?
When there is constant acceleration and motion along a straight line.
What is the effect of mass on the acceleration for an object in free-fall?
No effect
What is the relationship between displacement and time for an object falling
freely from rest?
Displacement is proportional to the time squared (s = 1/2 a t^2)
What is a projectile
An object acted upon only by the force of gravity
What shape is the path of a projectile?
Parabolic
What is the initial vertical velocity of an object projected horizontally?
0
What is the angle of projection that results in maximum range
45 degrees
Ignoring air resistance what is the acceleration of a projectile?
Always g downwards
How does horizontal velocity vary in projectile motion?
It is constant
Why can SUVAT equations can be used for the vertical component of projectile motion
Since the motion is in a single direction with a constant acceleration
What is the vertical velocity at the peak of projectile motion?
Zero
