a ball is thrown downward from the top of roof with a speed of 25 m/s. after 2 s, its velocity will be:

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

What are atoms of the same element with varying number of neutrons