Easy Riddles and Answers

Question: I'm small but big, i hide behind you but come out when you fall... What am I?

Question: It takes 45minutes for a man to cross the brige onthe brige there is a security personel who doesn't allow people to cross the brige to either side but he sleeps for only 35minutes so there was a wise man who crossed the brige so how could he do it

Question: 7 frogs are sitting on a log. 1 of them decides to jump off of the log. At this moment how many frogs are on the log?

Question: What has feet and legs, but nothing else?

Question: I'm measured in temperature and time, but have neither.

What am I?