Find the x and y-coordinates of the center of gravity of a 4.00-ft by 8.00-ft uniform sheet of plywood with the upper right quadrant removed as shown in the figure below. Hint: The mass of any segment of the plywood sheet is proportional to the area of that segment.

The lintel of prestressed reinforced concrete in the figure below is 1.50 m long. The concrete encloses one steel reinforcing rod with cross-sectional area 1.70 cm2. The rod joins two strong end plates. The cross-sectional area of the concrete perpendicular to the rod is 52.5 cm2. Young's modulus for the concrete is 3.00 x 1010 N/m2. After the concrete cures and the original tension T1 in the rod is released, the concrete is to be under compressive stress 8.30 x 106 N/m2. (a) By what distance will the rod compress the concrete when the original tension in the rod is released?(b) What is the new tension T2 in the rod?(c) The rod will then be how much longer than its unstressed length?(d) When the concrete was poured, the rod should have been stretched by what extension distance from its unstressed length?(e) Find the required original tension T1 in the rod.   I only need help with parts c,d,e.

A 3500 kg statue is placed on top of a cylindrical object (Y= 2.3 x10^10 Pa). The stand has a cross sectional area of 0.073m^2 and a height of 1.8 m. Find the change in height of the object in meter.

In the figure below, both the ceiling and the ruler accelerate together at 2.5 m/s² in the +y direction, and the reading to the "NEW" length of the vertical wire is as indicated. Ignore the effect on the two diagonal wires. Other parameters are below: Weight of the pan = 5 N Weights (or loads) = 55 N Originally, the wire has a length 0.200 cm, and diameter of 1 cm. Calculate the Young's modulus of the wire in Pa (No need to type this unit!). NOTES: Use pi = 3.14. Final answer in ZERO decimal place. 4.000 4.100 4.200 cm 4.300 ▬▬▬▬▬▬▬▬▬‒