A 37 kg father fashions a swing for his children out of a long rope that he fastens to the limb of a tall tree. As one of the children swings from this rope that is 7.3 m long, his tangential speed at the bottom of the swing is 4.0 m/s. Required:
a. What is the centripetal force of the child at the bottom of the swing?
b. What provides the centripetal force that keeps the child moving in an arc?

1. gravitational acceleration
2. the height of the tree
3. the tension in the rope
4. the weight of the child

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !