Its Physics wave. Plz anyone answer the last question in my profile. I need it a lot. Please don't answer irrelevant things. And tamil42 u are not allowed to answer.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?

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?