If x = at + bt², where x is the distance travelled by the body in kilometer and t is the time in second, then the unit of b is:
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Question

If x = at + bt², where x is the distance travelled by the body in kilometer and t is the time in second, then the unit of b is:

G1 Physics · Accepted Answer

Step 1: The term bt² must have the same unit as x. Step 2: Therefore unit of b = unit of x / unit of t² = km/s². Final: Correct answer: C.