Yes, a plane can absolutely crash if it exceeds its Maximum Takeoff Weight (MTOW) or if the weight is distributed incorrectly, leading to an unbalanced Center of Gravity (CG). In physics terms, an overweight plane requires a much higher airspeed to generate the necessary lift to stay airborne. If a pilot tries to take off with too much weight, the aircraft might run out of runway before it reaches that speed, or it might "stall" immediately after lifting off because the wings cannot support the load. Weight also affects the plane's structural integrity; excessive weight puts dangerous stress on the landing gear and the airframe, especially during turbulence or landing. Furthermore, an overweight plane has a drastically reduced climb rate, making it impossible to clear obstacles like trees or mountains near the airport. This is why airlines and pilots perform meticulous "Weight and Balance" calculations before every flight, as even a few hundred pounds of extra cargo or fuel can be the difference between a safe flight and a catastrophic aerodynamic failure.