My teacher gave us these extra credit problems and I couldn't really solve them. Here they are: "If air resistance did not exist, would rain be dangerous? Why?" "On the imaginary planet Zelth, a 100 kg mass weighs 15.8N. What is the acceleration due to gravity on Zelth? How does it compare to gravity on Earth? What is your weight on Zelth?" Also don't just give me the answers, show me how to do them.