(Originais Teachy 2023) - Question Easy of Physics

A solid object is fully submerged in a liquid with a density of 1200 kg/m³ at a depth of 8 metres. Given that the acceleration due to gravity is 9.81 m/s², let’s figure out how the pressure from the liquid on the object changes with depth and how this affects the total buoyant force acting on the object.

A traffic engineer installed convex mirrors at various busy intersections to enhance driver visibility and help prevent accidents. At the same time, at a research facility, concave mirrors are used to project larger images of scientific experiments. Taking into account the image formation properties of these two types of mirrors, which of the following statements accurately describes the characteristics of the images formed by convex and concave mirrors in these scenarios?

A block of mass m is released from rest at the top of an inclined ramp at an angle θ to the horizontal. As it moves down the ramp, the block covers a distance s until it hits a flat surface with a coefficient of friction μ. After travelling a distance d along the flat surface, the block ascends a second ramp sloped at the same angle θ. Taking into account the conservation of mechanical energy through the descents and ascents, along with the effect of the friction force on the flat surface, what is the maximum height h that the block reaches on the second ramp?