Force and Motion

What force is applied at this moment?

I am a force that can make something fall slowly and you need me if you want to fly a kite

I can make the moving object be slowed down and stopped

What forces are applied at this moment?

I am a force that make people can walk properly and I can make everything get attracted and fall to the ground

I can attract any metal things and I am useful to help the fridge door close tightly.