# The average resisting force that must act on 5kg mass to reduce its speed from 65ms^-1 to 15ms^-1 in 2s is

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The average resisting force that must act on 5kg mass to reduce its speed from 65ms^-1 to 15ms^-1 in 2s is
A. 12.5N
B. 25 N
C. 50 N
D. 100 N

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