pulling a mass of 15 kg from a bucket from a depth of 6 meters well for 20 seconds, what was its force

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

Aviolently rotating column of air is formed around a region of extremely low air pressure above land. which of these weather conditions is most likely to follow? blizzard cyclone tornado hurricane

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (