44443
Description
Mind Map by Georgiebutt31097, updated more than 1 year ago
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Created by Georgiebutt31097
over 11 years ago
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Forces and
their effects
- Speed and velocity are both how fast you're going
- Speed is just how fast you're going (eg. 30
mph or 20m/s) with no regard to the
direction.
- Velocity however must also have the direction
specified eg. 30 mph north or 20m/s, 060degrees.
- Speed = distance/time
- Speed is just how fast you're going (eg. 30
mph or 20m/s) with no regard to the
direction.
- Distance time graphs
- 1) gradient=speed.
- 2) flat sections are where it's stationary.
- 3) straight uphill or downhill sections mean it is traveling at a steady speed.
- 4) the steeper the graph the faster its going.
- 5) downhill sections mean its going back toward its starting point.
- 6) curves represent acceleration or deceleration.
- 7) a steepening curve means its speading up (increasing gradient)
- 8) a leveling off curve means its slowing down (decreasing gradient).
- Calculating speed - is just the gradient
- Speed = gradient =
- vertical
---------
horizontal
- =
- 500
-----
30
- =
- 16.7m/s
- Speed = gradient =
- 1) gradient=speed.
- Acceleration and velocity-time graphs
- Acceleration is how quickly velocity is changing
- Acceleration =
- Change in
velocity
-------------------
Time Taken
- Change in
velocity
-------------------
Time Taken
- (v - u)
---------
a X t
- v = final velocity
and u = the initial
velocity.
- v = final velocity
and u = the initial
velocity.
- 1) gradient = acceleration.
- 2) flat sections represent steady speed.
- 3) the steeper the graph, the greater the acceleration or delceleration.
- 4) uphill sections (/) are acceleration.
- 5) downhill sections (\) are deceleration.
- 6) the area under any section of the graph is equal to the distance travelled in that time interval.
- 7) a curve means changing acceleration.
- Calculating acceleration, velocity and distance from
the graph
- 1) the acceleration represented by the first section of the graph is :
- Acceleration =
- gradient =
- vertical change
----------------
horizontal change
- 30
----
20
- = 1.5 m/s2
- = 1.5 m/s2
- =
- 30
----
20
- vertical change
----------------
horizontal change
- gradient =
- Acceleration =
- 2) the velocity at any point can be simply found by reading the value off the velocity axis.
- 3) the distance travelled in any time interval is equal to the area under the graph.
- 1) the acceleration represented by the first section of the graph is :
- Acceleration is how quickly velocity is changing
- Weight, mass and gravity
- Forces and acceleration
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