Which two external forces most commonly act on darts as they travel toward a dartboard?

Three $50\bullet \mathrm{kg}$ blocks are connected in a row by two ropes on a frictionless horizontal surface and are at rest. What is the tension in rope $2$, which connects the second and third blocks?

In a suspension bridge, the main cable attaches to the left bridge support at a height of $h$ ft above the roadway. If the tension in the cable at this point is $T$ and the mass of the bridge deck is $m$, which of the following expressions correctly gives the vertical component of the force exerted by the cable on the support if the cable makes an angle $\theta$ with the horizontal?

Three masses are connected in a straight line by massless, rigid rods and placed on a frictionless horizontal surface. If a force $F$ is applied to the leftmost mass, what is the tension in the rod between the middle and rightmost mass?

An L-shaped object consists of three point masses, each of mass $m$, connected by light rods to form a right angle. If the lengths of the rods are $a$ and $b$, what is the moment of inertia of the system about an axis perpendicular to the plane and passing through the vertex of the L-shape?

Two blocks of masses $m_1$ and $m_2$ are connected by a massless rope and pulled horizontally on a frictionless surface by a force $F$ applied to $m_2$. What is the tension in the rope between the blocks?

Three people pull simultaneously on a stubborn donkey with forces of $100$ N, $120$ N, and $80$ N, all in the same direction. What is the magnitude of the net force acting on the donkey?

For the cantilever beam of length $L$ fixed at one end and subjected to a downward point load $F$ at its free end, what is the magnitude of the reaction force at the fixed support?