Answer the following within a word limit of 75 words to each one:
1. Consider the common practice of tethering tools used on scaffolds and elevated platforms to prevent them from falling. Attaching a tether to a railing of a guardrail is not recommended by the companies that make guardrails. Why do you think they object to this use of their railing? (Hint: Laws of energy conservation and conservation of momentum.)
2. Imagine that you coach a track team. You have three athletes who compete in the shot-put event. All three have good technique and achieve similar trajectory angles. One can put the shot farther than the others. Using the concepts of energy, work, and power, explain why he can outperform the others.
3. Explain the reason for having a grounding wire on portable power tools.
4. Explain what is meant by acclimatization. How would you apply this concept to a crew of temporary summer construction employees?
5. Explain the difference between fire prevention and fire protection.