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Question

A block of mass m is given a kick on frozen pond, imparting an initial speed of v=4 m/s. Coefficient of friction between block and ice is μK=0.5. Find the distance the block moves before stopping.

A
2.4 m
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B
0.8 m
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C
3.2m
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D
1.6 m
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Solution

The correct option is D 1.6 m
Wfriction=ΔK.E=012mv2
12/mv2=μmg x, where x is the distance that block moves before stopping.
x=v22mg=4×42×0.5×10=1610=1.6 m

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