# Forces and their effects

Mind Map by Georgiebutt31097, updated more than 1 year ago
 Created by Georgiebutt31097 about 7 years ago
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### Description

Science (Physics) Mind Map on Forces and their effects, created by Georgiebutt31097 on 04/12/2013.

## Resource summary

Forces and their effects
1 Speed and velocity are both how fast you're going
1.1 Speed is just how fast you're going (eg. 30 mph or 20m/s) with no regard to the direction.
1.2 Velocity however must also have the direction specified eg. 30 mph north or 20m/s, 060degrees.
1.3 Speed = distance/time
2 Distance time graphs
2.2 2) flat sections are where it's stationary.
2.3 3) straight uphill or downhill sections mean it is traveling at a steady speed.
2.4 4) the steeper the graph the faster its going.
2.5 5) downhill sections mean its going back toward its starting point.
2.6 6) curves represent acceleration or deceleration.
2.8 8) a leveling off curve means its slowing down (decreasing gradient).
2.9 Calculating speed - is just the gradient
2.9.2 vertical --------- horizontal
2.9.3 =
2.9.4 500 ----- 30
2.9.5 =
2.9.6 16.7m/s
3 Acceleration and velocity-time graphs
3.1 Acceleration is how quickly velocity is changing
3.2 Acceleration =
3.2.1 Change in velocity ------------------- Time Taken
3.3 (v - u) --------- a X t
3.3.1 v = final velocity and u = the initial velocity.
3.5 2) flat sections represent steady speed.
3.6 3) the steeper the graph, the greater the acceleration or delceleration.
3.7 4) uphill sections (/) are acceleration.
3.8 5) downhill sections (\) are deceleration.
3.9 6) the area under any section of the graph is equal to the distance travelled in that time interval.
3.10 7) a curve means changing acceleration.
3.11 Calculating acceleration, velocity and distance from the graph
3.11.1 1) the acceleration represented by the first section of the graph is :
3.11.1.1 Acceleration =
3.11.1.1.1.1 vertical change ---------------- horizontal change
3.11.1.1.1.1.1 30 ---- 20
3.11.1.1.1.1.1.1 = 1.5 m/s2
3.11.1.1.1.1.2 =
3.11.2 2) the velocity at any point can be simply found by reading the value off the velocity axis.
3.11.3 3) the distance travelled in any time interval is equal to the area under the graph.
4 Weight, mass and gravity
5
6 Forces and acceleration
7

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