A cone-shaped object will not roll in a straight line because the circumference of the cone changes from one end to the other. For example, if one end of the cone has a circumference of 10 inches, that end will travel 10 inches per revolution, but if the other end of the cone has a 2 inch circumference, it will only travel 2 inches per revolution.
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it just a straight line
If it is a horizontal straight line, it means the object is moving at constant velocity. If it is a sloped line, it means the object is accelerating.
An object is said to be in uniform motion if it moves in a straight line at constant speed.
If an object moving along a straight line,path,track etc.It,s motion is said to be straight line motion
A straight line with a positive slope on a position-time graph is the graph of an object that's moving in a straight line with constant speed.