Answer
69 N, directed opposite to the skater's velocity
Work Step by Step
p of skater = mv
= 46(-1.2)
= -55.2 Ns
F of wall on skater= $\frac{p}{s}$
= $\frac{-55.2}{0.8}
= -69 N
F of skater on wall
= 69 N
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