Physics And Measurement Question 28

Question: With the usual notations, the following equation St=u+12a(2t1) is

Options:

A) Only numerically correct

B) Only dimensionally correct

C) Both numerically and dimensionally correct

D) Neither numerically nor dimensionally correct

Show Answer

Answer:

Correct Answer: C

Solution:

We can derive this equation from equations of motion so it is numerically correct.

St = distance travelled in tth second = Distancetime=[LT1]

u = velocity = [LT1]

and 12a(2t1)=[LT1]

As dimensions of each term in the given equation are same, hence equation is dimensionally correct also.



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