# Physics: 2.1- Motion

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• Created by: zoej21
• Created on: 24-01-16 15:51
• Physics: P2.1- Motion
• if a velocity-time graph is a horizontal line, the acceleration is zero.
• eg.
• The gradient of the line on a velocity-time graph represents acceleration.
• The area under the line on a velocity-time graph represents the distance.
• eg.
• Velocity and Acceleration:
• Velocity is speed in a given direction (speed)
• Acceleration is the change of velocity per second (m/s^2)
• Acceleration= Change in velocity/ time taken
• Deceleration is negative acceleration.
• eg.
• Distance-Time Graphs:
• If an object is Stationary, the DTG is a horizontal line.
• If an object is moving at a constant speed, the DTG is a straight line that slopes upwards.
• The Gradient of a line (how steep it is) represents its speed.
• - Speed (m/s)= Distance/ Time
• Distance (m) = Speed x Time
• Time (s) = Distance/ Speed
• eg.
• Using Graphs:
• The Gradient= the Height of the triangle/ the Base of the triangle
• eg.