(a) Suppose that the displacement of an object is related to time according to the expression=

xBt^2. What are the dimensions ofB?

1)L^2/L

2)T^2/L

3)L × T^2

4)L/T^2

5) L/T

(b) A displacement is related to time asx=Asin(2πft), whereAandfare constants. Find the dimensions ofA. [Hint: A trigonometric function appearing in an equation must be dimensionless.]

1)L/T

2)T/L

3)L

4)L × T

Hey guys I've used the site in the past and it has helped me tremendously. I'm now in a physics class and its going to be a long uphill struggle for me. These are 2 problems out of 15 from some homework I have and if someone can break it down for me that would be more than wonderful.