What Am I Riddles

Question: I only point in one direction,
but I guide people around the world.

What am I?

Question: What is harder to catch the faster you run?

Question: I have no eyes, ears, tongue, or nose.
Yet I see, hear, taste, and smell everything.

What am I?

Question: I'm a measurement of time.
But you'll find me on a map, not a clock.

What am I?

Question: I join you in battle, fist clenched tight.
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.

What am I?