3. Chrissy is very distraught about all the work she has due for school. One day she just could not take it anymore and decides to jump from the roof of the school. While standing on the edge of the roof
Layla starts to think. Her thoughts turn to her favorite class (physics). She knows that the roof of
the school is 11.2 meters above the sidewalk. Layla calculates the following: a) Her velocity just
before she would hit the ground. b) How long it would take for her to hit the ground. c) Her
velocity after 1.15 seconds. After seeing these answers she decided not to jump. Physics saves
another life. What were her answers? (60 pts)

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created