Find the minimum work that must be done on a block to lift it vertically through and…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Find the minimum work that must be done on a

3\,\text{kg}

block to lift it vertically through

5\,\text{m}

and give it an upward speed of

4\,\text{m/s}

at that height. Take

g = 9.8\,\text{m/s}^2

. (a)

174\,\text{J}

(b)

147\,\text{J}

(c)

171\,\text{J}

(d)

195\,\text{J}

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