Aflowerpot falls from a windowsill 25.0 m above the sidewalk. a. how fast is the flowerpot moving when it strikes the ground? b. how much time does a passerby on the sidewalk below have to move out of the way before the flowerpot hits the ground?

Explanation:

Given

Height of window h=25 m

let us take v be the final velocity of Flower pot before hitting the sidewalk

using

here

thus

Time taken by Flower Pot to reach side walk is

Thus Passerby has 2.25 s to move out of the way to avoid Flower pot

d

explanation:

v=uf/(u-f)

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

=50/-5

=-10 cm (formed at other side)

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6