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A tank and a deflector are placed on a frictionless trolley. The tank issues water jet (mass density of water = 1000 kg/m3), which strikes the deflector and turns by 45°. If the velocity of jet leaving the deflector is 4 m/s and discharge is 0.1 m3 /s, the force recorded by the spring will be
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- 100 N
- 100 √2 N
- 200 N
- 200 √2 N
- 100 N
Correct Option: D
Horizontal component of force exented by jet, Fx
= force on spring balance = ρAV2 cosθ
= ρQV cosθ
= 1000 × 0.1 × 4 × cos 45°
= 200 √2 N
