Final answer:
The kinetic energy at the bottom of the slide is 100 J.
Step-by-step explanation:
When the object is at the top of the slide, it has potential energy. As it slides down, this potential energy is converted into kinetic energy. According to the law of conservation of energy, the total energy remains constant, so the amount of kinetic energy at the bottom is equal to the initial potential energy at the top. Therefore, the kinetic energy at the bottom of the slide is 100 J.