Which type of investigation typically include independent variable and dependent variables a) comparative and experimental b) descriptive and comparative c) descriptive and experimental d) descriptive comparative and experimental

D. descriptive because it makes more sense to me then  all the others.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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