Flashcards in P1 Motion Deck (18):

1

## Weight is

### The amount of gravitational force an object is experiencing, is a VECTOR, is a force so measured in N

2

## Mass is

### How much of something there is, is a SCALAR, measured in Kg

3

## Scalar

### A physical quantity with only magnitude, e.g. speed, distance, mass, energy etc.

4

## Vector

### A physical quantity with magnitude and a direction, e.g. force, velocity, displacement, weight, acceleration

5

## Difference between distance and displacement

###
Distance is a scalar, how far something has moved

Displacement in a vector, how far something has moved in a specific direction

6

## Difference between speed and velocity

###
Speed is a scalar, how fast something is moving

Velocity is a vector, how fast something is moving in a specific direction

7

## Acceleration is

### The change in speed/velocity of an object over time(- acceleration is deceleration)

8

## Acceleration, velocity, time formula

###
Acceleration = change in velocity/ time

a=v-u/t

Change in velocity is final velocity-starting velocity(v-u)

9

## Distance, speed equation

### Speed=distance/time

10

## How can speed be measured in a school

### Time an object move 1 meter, do 1 / time in seconds

11

## Typical speeds for walking, running, cycling, car

###
Walking 1.4 m/s

Running 4 m/s

Cycling 6m/s

Car on motorway 31m/s

Car on typical town speed limit 10.5 m/s

12

## Distance/time graphs

###
Flat = stationary

Steep = fats

Shallow = slow

Curving = acceleration

13

## How to determine average speed from a distance/time graph

### Take an amount of time, e.g. 10 seconds, then find the change in distance over the 10 seconds to calculate speed with s=d/t

14

## Acceleration, velocity, distance formula

### v^2-u^2= 2*a*x

15

## Velocity/time graphs

###
Going up = speeding up, going down = slowing down, flat = constant speed

Steep = large acceleration, shallow = slow acceleration

+velocity = going away

-velocity = coming towards

16

## Force definition

### Something which changes the motion of an object

17

## Energy definition

### The capacity for doing work

18