If a body travels half its total path in the last 1.10 s of its fall from rest, find the total time of its fall (in seconds).

3.75 s

Explanation:

Given Body travels half of its motion in last 1.1 sec

Let h be the height and t be the total time taken

here initial velocity is zero

Now half of the distance traveled will be in t-1.1 s and half distance traveled is in last 1.1 s

from 1 & 2 we get

Therefore two value of t is satisfying the equation  but only one value is possible

therefore t=3.75 s

iron would move it is magnetic there is a mag field around the current in the wire

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j