Consider the motion of a bullet fired straight down from the top of a high cliff.
Consider only the motion after the bullet has
left the barrel of the gun and before it hits the
ground. Ignore air resistance.
What is the magnitude of the acceleration
of the bullet during this motion?
1.Equal to 9.8m/s^2
2. First less than 9.8 m/s², then greater
3. More than 9.8 m/s2
4. Equal to 0
5. First greater than 9.8 m/s2, then less
6. Less than 9.8 m/s2
Who is the answer !?

I) a gas contained within a piston-cylinder assembly undergoes two processes, a and b, between the same end states, 1 and 2, where p1 = 10 bar, v1 = 0.1 m3 , u1 = 400 kj and p2 = 1 bar, v2 = 1.0 m3 , u2 = 200 kj: ' process a: process from 1 to 2 during which the pressure-volume relation is pv = constant. ' process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to state 2. kinetic and potential energy effects can be ignored. for each of the processes a and b, a) sketch the process on a p-v diagram. b) evaluate the work, in kj. c) evaluate the heat transfer, in kj.(ans : qb,12 = -65.0 kj)