Question

A jet of oil of relative density 0.8 and of area 0.02 $m^2$ issues at 10 m/s. If it strikes normally on a stationary plate, the force exerted on the plate is

• A. 1906 N
• B. 15606 N
• C. 1600 N
• D. 19581 N

Answer 1

The correct option is C 1600 N

$\rho =800kg/m^3$

$F=\rho AV\left(V_{w1}\right)$

$A=0.02m^2$

$=800\left(0.02\right)10\left(10\right)$

$V=10m/s$

$=1600N$