Answers

(1)0.3×9.8=2.94(N)
(2)2.94/(20×5×10^(-4))=2.94×10^2 (Pa)
(3)C. 2.94/(6×5×10^(-4))=9.8×10^2 (Pa)
(1)340×3=1020(m)
(2)1500/2=750(m/s)

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