The average resisting force that must act on `5kg` mass to reduce its speed from 65 to `15ms^-1` in `2s` isA. (a) `12.5N`B. (b) `125N`C. (c) `1250N`D. (d) None of these

The average resisting force that must act on `5kg` mass to reduce its

1.	The average resisting force that must act on `5kg` mass to reduce its speed from 65 to `15ms^-1` in `2s` isA. (a) `12.5N`B. (b) `125N`C. (c) `1250N`D. (d) None of these
Answer» Correct Answer - B `Impu lse=F_(av)(Deltat)=\|DeltaP\|` `:. F_(av)=(\|DeltaP\|)/(Deltat)=(m(v_i-v_f))/(Deltat)` `=((5)(65-15))/(2)` `=125N`

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The average resisting force that must act on `5kg` mass to reduce its speed from 65 to `15ms^-1` in `2s` isA. (a) `12.5N`B. (b) `125N`C. (c) `1250N`D. (d) None of these

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