I'm not sure about the magnitude, but the direction of the normal force is upward.
Answer:
W = y (b-a) / ab
Explanation:
Work is defined by the expression
W = ∫ F. dr
In this case the force is in the same direction of displacement, so the scalar product is reduced to the ordinary product
W = ∫ F dr
The expression of the strength left is
F = -y / x²
let's replace and integrate
W = ∫ (-y / x²) dx
W = -y (-1 / x)
We evaluate between the lower limit x = b + a to the upper limit x = 0 + a
W = -y (-1 / b + 1 / a)
W = y (b-a) / ab
where (b-a) is the distance traveled
Answer:
Explanation:
The figure of the problem is included below as attachment. The equations of equilibrium are presented below:
The system of equations are:
![N_{1} \cdot [(0.75\,m)-0.2\cdot (0.35\,m)] - N_{2}\cdot (1.25\,m) = 0](https://tex.z-dn.net/?f=N_%7B1%7D%20%5Ccdot%20%5B%280.75%5C%2Cm%29-0.2%5Ccdot%20%280.35%5C%2Cm%29%5D%20-%20N_%7B2%7D%5Ccdot%20%281.25%5C%2Cm%29%20%3D%200)
The solution of the system is:
, 
and 
The shortest time to reach a speed of 80 km/h is:
Because temperature sets a limit to how much water vapor can be in the air.
