steps to this problem, the answer is $882$N$.$ A lever system can allow us to lift heavy objects with less force. Consider one lever to lift a $1000-kg$ mass as drawn below. The lever is a large uniform steel beam with mass of $120$ kg and a moment of inertia of $251kg{m}^2$ about the fixed pivot point.

In this horizontal position, what applied force on the other end is needed to accelerate the $1000-kg$ mass upward at $1\mathrm{.}0\frac{m}{s^2}?($Hint: Due to the acceleration, the tension of the hanging mass is not simply $(1000kg)g.$ Also, the angular acceleration of the beam is not $0.)$

Bonus: Even though you are using substantially less force to lift the $1000-$kg mass, explain how energy is still conserved.