# Physics revision topic 1- Motion

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• Created by: xavedge
• Created on: 22-10-15 19:18
• Physics revision topic 1- motion
• DISTANCE TIME GRAPHS
• These are used to help us to describe an object in motion
• A distance time graph shows the distance an object has moved this is shown on the Y axis (the distance from the start point)
• The X axis shows the time taken for the object to travel the said distance
• SPEED
• the speed of an object is the distance travelled per secound
• M/S
• the steeper the gradient the greater the speed
• when the object is stationary the line is horizontal
• If the object is going at a constant speed the line will be straight and it will slope upwards
• Velocity and acceleration
• Velocity is the speed of an object in a given direction
• If the object changes direction it changes the velocity, even if it stays at the same speed
• If the velocity of the object changes, it means that it accelerates
• VELOCITY TIME GRAPHS
• A velocity time graphs shows the velocity of the object (Y-axis) and the time taken (X-axis)