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physics a2 unit 4 question- help!

Water of density 1000 kg m–3 flows out of a garden hose of cross-sectional area 7.2 × 10–4
m2 at a rate of 2.0 × 10–4 m3 per second. How much momentum is carried by the water leaving the hose per second?
A) 5.6 × 10–5 N s
B) 5.6 × 10–2 N s
C) 0.20 N s
D) 0.72 N s

^^ the answer is B but i have no idea how to do it >.< can someone please go through step by step!

Thank YOU!
Original post by susanjan123
Water of density 1000 kg m–3 flows out of a garden hose of cross-sectional area 7.2 × 10–4
m2 at a rate of 2.0 × 10–4 m3 per second. How much momentum is carried by the water leaving the hose per second?
A) 5.6 × 10–5 N s
B) 5.6 × 10–2 N s
C) 0.20 N s
D) 0.72 N s

^^ the answer is B but i have no idea how to do it >.< can someone please go through step by step!

Thank YOU!

the unit shows you that the momentum was derived from (force x time). I can manipulate the information given to find the mass, but that's as far as i could do
Reply 2
Avatar for susanjan123
susanjan123
OP
5
thats how far i got too :frown: thank you very much still for the help:smile:
Reply 3
Avatar for Kaneda
Kaneda
9
If they're review questions from the edexcel book type review questions unit 4 a2 physics into google
Something with Huddersfield should come up and they show the steps on how the answers were derived.


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