We've discussed elevators that are raised with cables, but many elevators use pistons. a pump provides fluid at very high pressure to the piston; the resulting force on the piston raises the elevator and passengers. for a typical piston elevator, the mass of the elevator and passengers is 2000 kg and the radius of the piston is a surprisingly small 4.2 cm. the elevator begins to move upward, accelerating at 0.80 m/s2.

t.                 w               e                 n                   t                 y                 c             h               a           r           a               c                 t             e             r             s        

you cant move and you feel like someones pushing you down onto your bed it can feel like you want to get up but you just can't it can be extremely scary

12000j is work done

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )