Draw what the net acceleration vs time graph would look like if: a) The net force is zero

b) Starting from rest, a car has a linear increase in velocity up to a constant velocity.

c) A ball is slowed to a stop by friction.

Please help. I am bleeding points in this class and can't afford to lose more. This is just a homework question, but my professor grades homework for correctness, not completion.

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!