Please answer the following questions

1) Relative motion (velocity) occurs in many everyday activities. Select an activity or scenario, and explain what role relative motion plays in the activity.

2) A swimmer heads directly north across a deep river at the speed of 3.5m/s relative to still water. The river is flowing east at 2.0 m/s and is 64 m wide.

a) What is the velocity of the swimmer relative to the river bank(shore)?

b)Calculate the time required to cross the river.

Please show all your work. Round the final answer to 2 significant digits

3) A ball is tossed from a window of a building. the ball is giver an initial velocity if 7.5m/s at an angle of 22.0 degrees above the horizontal.If the ball strikes the ground 28 m from the bottom of the building, what is the height of the window? Assume no air resistance.

Show all you work. Round to 2 significant digits.

4) You are on a boat on a river that is flowing due east. You are trying to reach a point across the rive that is due north.Explain how you can adjust the direction of a boat so that it travels straight across the river. In order for this to happen, what must the horizontal component of the boat velocity be?

5) A gr 12 physics student on a homemade hovercraft travels with an initial velocity of 2.35 m/s (W) undergoes an average acceleration of 1.40 m/s squared (N) for 3.45 s. What is the final velocity of the hovercraft?

Please show all your work. Round the final answer to 2 significant digits