Question

give three differences between speed and velocity .

what does the path of an object look like when it is in uniform motion ?

an object has moved through a distance can it have zero displacement if yes support your answer with an example . ​

Answer 1

Answers

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a) difference between speed and velocity.

Speed -

• speed of a body is the distance travelled by it per unit time .

• In speed , the direction of motion of the body is not specified .

• Speed has only magnitude to speed is a scalar quantity .

Velocity -

• velocity of a body is the distance travelled by it per unit time in a given direction .

• in velocity the direction of motion of the body is specified .

• velocity has both magnitude as well as the direction so velocity is a vector quantity .

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b) an object has a uniform motion if it travel equal distance in equal interval app time no matter how small this interval time maybe this means that in uniform motion speed is constant but the direction of motion may change as long as the speed remain constant the path of an object in uniform motion can have any shape : it can be a straight line path , curved path , a circular path or even a zigzag path .

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c) yes , even if an object has moved through a distance it can be zero displacement This can happen if after moving through a certain distance the moving object and come back to its starting position .

For example - if an athlete runs along a circular track and after completing one sound comes back to his starting point again then the distance moved by the athlete will be equal to the circumference of a circular track but is displacement will be zero because the straight line distance between his initial and the final position will be zero .

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