Unknown mass
find mass for cart on left. the mass for both without the masses on top is 500
what is missing mass
2494 1682

857

I'm not sure what your asking buddy.. but i know that you can weld two peices of steel by pure force and pressure.

That depends on what kind of environ meant it is in  in space it has the same force that was applied when the velocity was gained

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j