No because point A has to be higher for more KE to push the object and make the look
never seen one although i guess the elegant answer is D) none of the mentioned posibilities
Answer: 1.8m
Explanation:
Using the principle of moment to solve the question which states that the sum of clockwise moment is equal to the sum of anticlockwise moments.
The boy moves in the clockwise direction towards the pivot while the girl moves in the anticlockwise direction towards the pivot.
Since moment = force × perpendicular distance
CW moments = 60×1.5 = 90Nm
ACW moments = 50×x = 50x
Equating both moments to get 'x'
90 = 50x
x =9/5
x = 1.8m
This shows that the girl must sit 1.8m from the other side for equilibrium.:
Answer:
D
Explanation:
It is important that we have two variables, Independent
and Dependant Variable.
Answer:
17.97m/s
Explanation:
Density of air (ρ)air=1.23 kg/m3, and
Air speed (V) =20 m/sec, pressure gradient along the streamline, ∂p/∂x = 100N/m^3.
The equation of motion along the stream line directions:
considering the momentum balance along the streamline.
γsinθ-∂p/∂x=ρV(∂V/∂x)
Neglecting the effect of gravity , then γ=ρg=0
So, ∂p/∂x= -ρV(∂V/∂x)
∂V/∂x= - 100/(20X1.23)= -4.0650407/S
Also δV/δx=∂V/∂x
∂V/∂x=-4.0650407/S and δx=0.5 m
δV = (-4.0650407/S) *(0.5m)
δV = -2.0325203 m/S
So net air speed will be V+δV= -2.0325203+20 ≅17.96748 m/s
Approximately, V+δV=17.97m/s.
