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Motion in Straight Line
Question
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Can the speed of a body be negative?

Answer

Speed is defined as the ratio of total length of path travelled to the time taken to traverse the path.

The distance travelled by a paticle is always positive. Therefore, speed is positive quantity. 

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Some More Questions From Motion in Straight Line Chapter

What is rest?

What is motion?

Is absolute rest or absolute motion possible?

What is the most essential thing to study the motion of a body?

Can a body be always at rest in some frame?

Can a body be in motion in the frame associated with the body itself?

When an object in motion can be considered as particle or point object?

Can you think of physical phenomena involving the moon in which moon cannot be treated as particle?

A train is crossing the bridge. Can it be taken as a particle?

Can a train be taken a particle? Give an example in support of your answer.