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we saw four types of proportions between two variables a and b In the Direct Pro

ID: 1575502 • Letter: W

Question

we saw four types of proportions between two variables a and b In the Direct Proportionality case a b, we have a = k b. Lets suppose that you have [a] [J] (reads a in units of Joules) and [b] [m] (reads b in units of meter.) What would be the unit of the proportionality constant, k, in terms of [J] and [m]? Must show work. Partial credit applicable. variables a and In the Inverse Proportionality case a a , we have ad b [J] (reads a in units of Joules) and [b] [m](reads b in What would be the unit of the proportionality constant, k, in ter e Must show work. Partial credit applicable. 9. In class we saw four types of proportions between two va we have a = Lets suppose that you have [a] = units of meter.)

Explanation / Answer

8.

a = k*b

a = [J]

b = [m]

Since dimension on both side of equation should be same, So

[J] = k*[m]

dimension of k = [J/m] (Your answer will be this)

If you want answer in SI unit then

Joule = J in SI unit will be

We know that J is unit of work

work = F*d

F = M*a

W = M*a*d

Unit of m = kg

unit of a = m/sec^2

unit of d = m

SI unit of J = kg-m^2/sec^2

Since dimension on both side of equation should be same, So

[kg-m^2/sec^2] = k*[m]

dimension of k = kg-m/sec^2

9.

[J] = k/[m]

dimension of k = [J-m]