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12 Cards in this Set
- Front
- Back
Motion at constant speed |
S=ut |
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Average speed |
V=distance/time |
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Distance-time graph |
Gradient at a particular point is the instantaneous speed at that point, constant gradient=constant speed, zero gradient=stationary, negative gradient=object moves in opposite direction. |
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Displacement |
Straight line from the starting point to the finishing point. |
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Velocity |
The rate of change of displacement, velocity=distance/time |
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Acceleration |
Rate of change of velocity. Increases speed if in the same direction. Decreases speed if in opposite direction. Change direction if velocity if at right angles to velocity. |
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Velocity-time graph |
Gradient is acceleration. Line above the x-axis means motion to the right. Line below the x-axis means motion to the left. Horizontal line means constant velocity. Are between the graph and the x-axis is displacement. |
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Non-linear graphs |
Divide are into trapeziuns and add up all areas to estimate total displacement. |
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Motion with uniform acceleration |
SUVAT |
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Free-fall |
Suvat with acceleration equal to -9.81ms-2. Speed at highest point is zero. Upwards displacements and velocities are positive; downward displacements and velocities are negative. |
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Projectile motion |
Separate motion in the x and y axis |
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Independence of horizontal and vertical motion |
An object dropped from rest and an object fired horizontally from the same height will both hit the floor at the same time; because horizontal and vertical motion are independent: horizontal motion has no effect on vertical motion. |