A smooth wooden block is placed on a smooth wooden tabletop. You must exert a 14.0N force to keep the 40.0N block moving at constant velocity. a. What is the coefficient of sliding friction?
b. If a 20.0N brick is placed on the block, what force will be required to keep the block and brick moving at constant velocity?

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.