A2.0 kg mass tied to a rope and swung in a horizontal circle. if the velocity of the mass is 4.0 m/s and the radius of the circle is 0.50 m, what is the centripetal acceleration of the mass and the ternsion in the rope

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

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 !

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?