A70 kg student balances a 1200 kg elephant on a hydraulic lift. what is the diameter of the piston thestudent is standing on? (b) when a second student joins the first student, the piston sinks by 30 cm. what is the mass of the secondstudent? the density of the oil isrhooil= 917 kg/m3.

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.