4. A hydraulic lift consists of two pistons acting on a common fluid. If the areas of the two pistons are 50 cm2 and 2500 cm2, which end do you put under your 3000 lb car to lift it

Distance traveled is the average velocity times time.  When something is dropped (or thrown), it accelerates downward in accord with the acceleration of gravity ( g = 9.8m/sec2)

The increase in velocity while falling is simply t * 9.8,  t = 2, so the increase is 19.6 m/s.  The initial velocity is 3, so the final is 22.6, and the average is 25.6/2 = 12.8m/s

Therefore, d = v(average) * t = 12.8 * 2 = 25.6m

The equivalent formula is:

d = v(initial)*t + (a*t2) / 2

d = 3*2 + 4.9 * 4 = 25.6

Explanation:

Distance traveled is the average velocity times time.  When something is dropped (or thrown), it accelerates downward in accord with the acceleration of gravity ( g = 9.8m/sec2)

The increase in velocity while falling is simply t * 9.8,  t = 2, so the increase is 19.6 m/s.  The initial velocity is 3, so the final is 22.6, and the average is 25.6/2 = 12.8m/s

Therefore, d = v(average) * t = 12.8 * 2 = 25.6m

The equivalent formula is:

d = v(initial)*t + (a*t2) / 2

d = 3*2 + 4.9 * 4 = 25.6