Answer:
A. Loose concrete
Explanation:
Concrete is a solid composite structural material.It is the most used component in setting up a structure. Concrete is known for its very good ability to bear load, but can sometimes fail, or can be damaged. To rehabilitate or repair a concrete, the loose concrete must first be removed, so that the surface can be cleaned and well set before the material used for repair is applied on it.
Answer:
1. 3.75
2. 1.39 ft
Explanation:
The mechanical advantage is the ratio of the resistance force to the effort force.
MA = 75 lb / 20 lb
MA = 3.75
The sum of the torques about the fulcrum equals zero.
∑τ = Iα
(20 lb) (5.2 ft) − (75 lb) x = 0
x = 1.39 ft
Round as needed.
