Momentum

[Dil]

This question is infuriating me. It says the answer is 32, but I can't get that.
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What impulse is needed to change the speed of a 16 kg object from 14 m/s to 26 m/s in a time of 5s? How much force is needed?

mVf - mVi
(16)(26)-(16)(14) = 192

F(change in 5s)=192 192/5 = 38.4N
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What am I doing wrong?

[himanshu121]

Impulse is a vector quantity and speed a scalar. Is the direction changing pls see it

[Dil]

I don't think the direction is changing

[Adrian Baker]

Perhaps the given answer is wrong... It sure looks wrong to me!

[himanshu121]

Yes to me it 2 seems to be on wrong side
thats why i asked for direction

[NateTG]

You sure it's not 16 to 26 m/s or 14 to 24 m/s?