A 5 kg rock is lifted 2 m. Find the amount of work done.

Asher cycles 12 miles in 16 hours. what is his speed?

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.