A gardener waters the plants by a pipe of radius 1 cm. The water comes out at rate of 10 cm3/s. The reactionary force exerted on the hand of gardener is
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Answered by
5
Answer:
yaar answer is write the answer will be no answer will be 7 by 22 x 10 - 3
Answered by
3
Answer:
0.127N
Step-by-step explanation:
reaction force = Av
2
p
F=v
dt
dm
where vis the velocity of water
dt
dm
is the rate of mass flow
F=v
dt
dm
=vp
dt
dv
wherep is the density
A= area of cross section then F=vpA
dt
dv
=pAv
2
in this question directly
dt
dv
is given
dt
dv
=Av
10=
4
πd
2
v
therefore v=
πd
2
40
now F=
πd
2
40
p10 =
22×10
−2
400×1×7
= 127.27×10
−2
dyne
1dyne = 10
−5
N
now F=
10
−2
127.27
×10
−5
=0.127N
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