The force, as this weight drops is constant, mgh and so the work is just going to be m g h, h where this is h.
当重物掉落时候的力是恒定的，因此做功就是，这段长度是。
2
The cabinet agreed, but Secretary of State William H. Seward persuaded Lincoln to withhold the proclamation until a major Union military victory could give it added force.
On the basis of static aerodynamic force tests and dynamic response tests, the galloping and (vortex-induced) oscillation performances of H-shaped booms were investigated.