An 8.0-kg history textbook is placed on a 1.25-m high desk. How large is the gravitational potential energy of the textbook-Earth system relative to the
floor?
i’ll give brainliest

GPE=98J if the given gravity is 9.8 but the gravity is 10 it will be 100J

Explanation:

GPE=mgh so m=8kg g=9.8m/s^2 or 10J h=1.25m

so GPE=8kg×9.8 or 10 m/s^2×1.25m

GPE=98J if the given gravity is 9.8 and GPE=100 if the given gravity is 10.but ask your teacher (asker) and don't forget those formula

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)