(a) Write differences between speed and velocity. (b) speed of a moving object is x m s ^{-1} . Its

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7. MOTION

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$(a)$ Write differences between speed and velocity.

$(b)$ The speed of a moving object is $x m s ^{-1}$. Its velocity is $y m s ^{-1}$. What is the similarity observed ?

Option A

Option B

Option C

Option D

Solution

$(a)$ Speed is distance travelled per unit time, whereas velocity is displacement per unit time. Speed cannot be zero, displacement can be zero.

$(b)$ Both have the same units.

Standard 9

Science

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