A raindrop in a cloud has 320 J of potential energy due to its position above Earth. As the raindrop falls down to Earth, it gains kinetic energy. Approximately how much
kinetic energy does the raindrop have the moment before it makes contact with a
puddle on the ground?
O 0J
O 640J
O 160J
O 320J

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

What is the difference between mass density and weight density?

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?