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11964157
P9: Motion
Descrição
GCSE Physics Mapa Mental sobre P9: Motion, criado por Shannon O'Boy em 22-01-2018.
Sem etiquetas
physics
gcse
Mapa Mental por
Shannon O'Boy
, atualizado more than 1 year ago
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Criado por
Shannon O'Boy
mais de 6 anos atrás
48
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0
Resumo de Recurso
P9: Motion
Speed and distance-time graphs
Distance-time graphs can show us the speed a vehicle is travelling.
The gradient of the line tells us the speed of the car.
If the graph has a straight line, the speed is constant.
The steeper the gradient, the greater the speed.
If a graph has a curved line, then speed is changing.
Speed can be calculated at any point by working out the tangent to a point.
If the line is flat, then the vehicle has no speed and is not moving.
Velocity and acceleration
Velocity is speed in a given direction.
Two vehicles may have the same speed but different velocities dependant on their direction.
If a vehicle travels in a circular direction, its speed is the same however the velocity is continuously changing.
Displacement is the distance travelled in a given direction.
The acceleration of a vehicle is its change in velocity per second.
Deceleration is when a vehicle slows down.
Velocity-time graphs
The gradient of the line shows a vehicles' acceleration.
When brakes are applied to a vehicle, it begins to decelerate.
Because of this, the line of the graph will have a negative gradient.
The area under a velocity-time graph can calculate the distance travelled.
Anexos de mídia
Distance Time Graph (binary/octet-stream)
Screen Shot 2018 01 22 At 19.29.54 (binary/octet-stream)
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