The six figures below depict six model rockets that have just had their engines

Question

The six figures below depict six model rockets that have just had their engines turned off. All of the rockets are aimed straight up, but their speeds differ. All of the rockets are the same size and shape, but they carry different loads, so their masses differ. The mass and speed for each rocket is given in each figure. (In this situation we are going to ignore any effect air resistance may have on the rockets.) At the instant when the engines are turned off, the rockets are all at the same height. Rank these model rockets from greatest to least on the basis of the kinetic energy they have at the top of their flights. Greatest 1 _____ 2 _____ 3 _____ 4 _____ 5 _____ 6 _____ Least Or, all rockets have the same kinetic energy. _____ Please carefully explain your reasoning.

Explanation / Answer

They will all have same kinetic energy at the top. K.E. = 0J

Since, at the top of projectile they will all be having 0 velocity momentiarily , so K.E is given by = (1/2)*m*v^2

hence, K.E. = 0 J. Answer

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