Решение: An object moves horizontally 4 m under the effect of forces F₁ = 50 N, $F_2 = 4

An object moves horizontally 4 m under the effect of forces $F_1 = 50 \text{ N}$, $F_2 = 40 \text{ N}$, and $F_3 = 30 \text{ N}$, as shown in the figure. Find the net work done by the net force, if surface is frictionless ($g = 10\text{N/kg}$) ($\cos 37^\circ = 0.8$, $\sin 37^\circ = 0.6$, $\cos 90^\circ = 0$, $\cos 180^\circ = -1$)

[Figure: A block is shown on a horizontal surface. A force $F_1 = 50\text{ N}$ is applied at an angle of $37^\circ$ above the horizontal, pulling it to the right. A force $F_2 = 40\text{ N}$ is applied vertically downwards on the block. A force $F_3 = 30\text{ N}$ is applied horizontally to the left on the block. The block moves 4 m to the right, indicated by a double-headed arrow labeled '4 m'.]