Why shear is more on the ends of beam?

Shear force tends to be higher at the ends of a beam due to the way loads are applied and transferred through the structure. At the supports, the reaction forces must counterbalance the applied loads, resulting in maximum shear at these points. Additionally, as the load is distributed along the length of the beam, the shear force decreases towards the center, where bending moments are typically higher. This distribution leads to the observation that shear is concentrated at the ends of the beam.