Later, while taking your groceries back to the car, you accidentally let go of your cart. it rolls straight down a grassy slope at a constant speed of 10 m/s. what is the net force on the cart during this motion

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?