Graphs help describe motion of objects - distance-time graph shows distance object moves from point (y-axis) against time taken (x-axis)
Speed: distance travelled each second - represented by gradient - steeper the gradient = faster object moves, horizontal line = object stationary, constant speed = straight line
Speed (m/s) = distance travelled (m) / time taken (s)
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P2.1.2 - Velocity and Accelaration
Velocity: speed of object in given direction - change direction = change velocity, even if speed stays same - change in velocity = acceleration
a = (v - u) / t
a - acceleration (m/s2)
v - final velocity (m/s)
u - intial velocity (m/s)
t - time taken (s)
Acceleration = negative - deceleration
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P2.1.3 - More About Velocity-Time Graphs
Velocity-time graph shows velocity of object (y-axis) against time taken (x-axis)
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