Effort, or exertion, refers to the physical or mental energy applied to accomplish a task or achieve a goal. It can involve various activities, from lifting heavy objects to studying for an exam. The amount of effort exerted often influences the outcome, as greater effort typically leads to better results. In sports, for example, athletes like Usain Bolt demonstrate high levels of effort during competitions, pushing their bodies to the limit. Similarly, in academics, students may exert effort by dedicating time to homework and studying, which can enhance their understanding and performance in subjects like mathematics or science.