Final answer:
After 25% of the electric pole is driven into the ground, the length of the pole above the ground is 9 meters.
Step-by-step explanation:
If 25% of the electric pole is driven into the ground, it means that only 75% of the pole remains above the ground. To find the length of the pole above the ground, you can calculate 75% of the original length of the pole.
Length above the ground = 75% of 12m
To calculate this, you can use the formula:
Length above the ground = 0.75 × Original length of the pole
Length above the ground = 0.75× Original length of the pole
Length above the ground = 0.75 × 12 m
Length above the ground = 0.75×12m
Length above the ground = 9m
Length above the ground= 9m
In general, to solve problems of this type, one would have to apply principles of static equilibrium to find out how much a pole is bent or compressed when it experiences a force. These problems involve the calculation of resultant forces, moments, and reactions using the geometry of the setup, material properties of the pole (like stiffness or modulus of elasticity), and external conditions (like the tension in wires).