a) let t is the time taken.
use, H = voy*t + (1/2)*g*t^2
H = 0 + (1/2)*g*t^2
t = sqrt(2*H/g)
= sqrt(2*1.40/9.8)
= 0.534 <<<<<--------------Answer
b) v2 = x/t
= 7.7/0.534
= 14.4 m/s <<<<<--------------Answer
c) use, A1*v1 = A2*v2
v1 = (A2/A1)*v2
= (1.3/15)^2*14.4 (A2/A1 = (r2/r1)^2)
= 0.108 m/s <<<<<--------------Answer
d) pressure at the nozzle = 1.013*10^5 pa <<<<<--------------Answer
e) use Bernoullies equation,
P1 + rho*g*h1 + (1/2)*rho*v1^2 = P2 + rho*g*h2 + (1/2)*rho*v2^2
P1 = P2 + rho*g*(h2 - h1) + (1/2)*rho*(v2^2 - v1^2)
= 1.013*10^5 + 1000*9.8*0.03 + (1/2)*1000*(14.4^2 - 0.108^2)
= 2.053*10^5 pa <<<<<--------------Answer
f)
F = (P2 - Po)*A
= (2.053 - 1.013)*10^5*(pi*0.015^2)
= 73.5 N <<<<<--------------Answer
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