P2 1 Motion Flashcards Preview

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Flashcards in P2 1 Motion Deck (19):
1

How is a stationary object represented in a distance-time graph?

A horizontal, straight line

2

How is an object moving at a constant speed shown on a distance-time graph?

A straight line that slopes upwards

3

What does the gradient of a line in a distance-time graph represent?

The speed

4

If the gradient of the line in a distance-time graph is steeper what does it show?

The speed is greater

5

What is the equation for speed?

Speed = distance/time

6

What goes on the x-axis and what goes on the y-axis on a distance-time graph?

x - time

y - distance

7

What does the term velocity mean?

Speed in a given direction

8

An object moving steadily round in a circle has a constant speed but why not a constant velocity?

The direction keeps changing

9

What is meant by the term acceleration?

The change of velocity per second.

10

What is the scientific unit for speed?

m/s

11

What is the scientific unit for acceleration?

m/s2

12

What is the equation for calculating acceleration?

acceleration = change in velocity in m/s / time taken for the change in s

Change in velocity is final velocity - initial velocity

a= v-u / t

13

What term is used when an object decelerates?

Deceleration or negative acceleration

14

What does a line sloping upwards show?

Acceleration

15

What does a straight line sloping upwards show?

Constant acceleration

16

What does the gradient in a velocity-time graph represent?

Acceleration

17

How is constant velocity shown on a velocity-time graph?

A horizontal, straight line

18

If the gradient of a line in a velocity-time graph is negative, what does it show?

Deceleration

19

What does the area underneath the line in a velocity-time graph represent?

Distance