Which example would be found in Earth’s biosphere?

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

What does si stand for,when referring to a system of measurement