3.1-3.8 Motion Quizlet Cards

Question 1

What is displacement?

Answer 1

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

Question 2

What is velocity?

Answer 2

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

Question 3

What is speed?

Answer 3

Change in distance travelled per unit time (scalar)

Question 4

What is acceleration?

Answer 4

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

Question 5

What are the units of acceleration?

Answer 5

ms⁻²

Question 6

What is meant by constant velocity/uniform motion?

Answer 6

Speed and direction of motion don’t change

Question 7

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

Answer 7

Speed

Question 8

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

Answer 8

Velocity

Question 9

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

Answer 9

Acceleration

Question 10

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

Answer 10

Change in displacement

Question 11

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

Answer 11

Change in velocity

Question 12

When can the SUVAT equations by used?

Answer 12

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

Question 13

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

Answer 13

None

Question 14

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

Answer 14

Displacement is proportional to time squared (sαt²)

Question 15

What is a projectile

Answer 15

An object acted upon only by the force of gravity

Question 16

What shape is the path of a projectile?

Answer 16

Parabolic

Question 17

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

Answer 17

Zero

Question 18

What angle of projection that results in maximum range

Answer 18

45°

Question 19

Ignoring air resistance what is the acceleration of a projectile?

Answer 19

Always g downwards

Question 20

How does horizontal velocity vary in projectile motion?

Answer 20

It is constant

Question 21

If a projectile returns to its starting height

Answer 21

Initial and final velocities have the same magnitude

Question 22

What equation used for the horizontal component of projectile motion?

Answer 22

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

Question 23

What aspect links the vertical and horizontal motion of a projectile

Answer 23

Time taken to fall

Question 24

Why can SUVAT equations can be used for the vertical component of projectile motion

Answer 24

Since the motion is in a single direction with a constant acceleration

Question 25

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

Answer 25

Zero