3.1-3.8 Motion Quizlet Cards Flashcards Preview

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Flashcards in 3.1-3.8 Motion Quizlet Cards Deck (25)
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1

What is displacement?

The distance of an object from a point in a specific direction (vector)

2

What is velocity?

Rate of change of displacement (vector) ∆s/∆t if constant

3

What is speed?

Change in distance travelled per unit time (scalar)

4

What is acceleration?

Rate of change of velocity (vector) ∆v/∆t if constant

5

What are the units of acceleration?

ms⁻²

6

What is meant by constant velocity/uniform motion?

Speed and direction of motion don't change

7

What is represented by the gradient of a distance-time graph?

Speed

8

What is represented by the gradient of a displacement-time graph?

Velocity

9

What is represented by the gradient of a velocity-time graph?

Acceleration

10

What is represented by the area under a velocity-time graph?

Change in displacement

11

What is represented by the area under an acceleration-time graph?

Change in velocity

12

When can the SUVAT equations by used?

When there is constant acceleration and motion along a straight line.

13

What is the effect of mass on the acceleration for an object in free-fall?

None

14

What is the relationship between displacement and time for an object falling freely from rest?

Displacement is proportional to time squared (sαt²)

15

What is a projectile

An object acted upon only by the force of gravity

16

What shape is the path of a projectile?

Parabolic

17

What is the initial vertical velocity of an object projected horizontally?

Zero

18

What angle of projection that results in maximum range

45°

19

Ignoring air resistance what is the acceleration of a projectile?

Always g downwards

20

How does horizontal velocity vary in projectile motion?

It is constant

21

If a projectile returns to its starting height

Initial and final velocities have the same magnitude

22

What equation used for the horizontal component of projectile motion?

Displacement = Velocity x time (since horizontal velocity is constant)

23

What aspect links the vertical and horizontal motion of a projectile

Time taken to fall

24

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

25

What is the vertical velocity at the peak of projectile motion?

Zero