Final answer:
The speed of the block when it reaches the bottom of the incline is greater than 0m/s.
Step-by-step explanation:
When a block slides down an incline, the final speed at the bottom of the incline can be determined based on the conservation of energy. Since only the frictional force does work on the block during the round trip, the initial potential energy at the top of the incline is converted into kinetic energy and thermal energy due to friction at the bottom. Therefore, the speed of the block when it reaches the bottom of the incline would be greater than 0 m/s.