It is a common observation that rain clouds can be at about a kilometre altitude above the groun....

Channel:
PW Solutions
Subscribers:
443,000
Published on ● Video Link: https://www.youtube.com/watch?v=_PTDTd67Wbg


Duration: 0:00
6 views
0

It is a common observation that rain clouds can be at about a kilometre altitude above the ground.
(a) If a rain drop falls from such a height freely under gravity, what will be its speed? Also calculate in \( \mathrm{km} / \mathrm{h} .\left(g=10 \mathrm{~m} / \mathrm{s}^{2}\right) \)
(b) A typical rain drop is about \( 4 \mathrm{~mm} \) diameter. Momentum is mass \( x \) speed in magnitude. Estimate its momentum when it hits ground.
(c) Estimate the time required to flatten the drop.
(d) Rate of change of momentum is force. Estimate how much force such a drop would exert on you.
(e) Estimate the order of magnitude force on umbrella. Typical lateral separation between two rain drops is \( 5 \mathrm{~cm} \).
(Assume that umbrella is circular and has a diameter of \( 1 \mathrm{~m} \) and cloth is not pierced through !!) 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2024-09-07The order of screening effect of electrons of \( s, p, d \) and \( f \) orbitals of a given shel....
2024-09-07In the circuit shown, initially there is no charge on capacitors and keys \\( \\mathrm{S}_{1} \\....
2024-09-07"Among halogens, the correct order of amount of energy released in electron gain (electron gain ....
2024-09-07Which of the following statement(s) is(are) correct about the spectrum of hydrogen atom? ....
2024-09-07Two identical moving coil galvanometer have \\( 10 \\Omega \\) resistance and full scale deflect....
2024-09-07in 2nd there should be 62.4 instead of 62,also text solution is incorrect.....
2024-09-07A projectile is thrown from a point \\(\\mathrm{O}\\) on the ground at an angle \\(45^{\\circ}\\....
2024-09-07A series LCR circuit is connected to a 45sin(ωt) Volt source. The resonant angular frequenc....
2024-09-07A thermally isolated cylindrical closed vessel of height \\( 8 \\mathrm{~m} \\) is kept vertical....
2024-09-07A projectile is thrown from a point \\(\\mathrm{O}\\) on the ground at an angle \\(45^{\\circ}\\....
2024-09-06It is a common observation that rain clouds can be at about a kilometre altitude above the groun....
2024-09-05If3x=4x-1, thenxis equal to....
2024-09-05Let X be a set with exactly 5 elements and Y be a set with exactly 7 elements. If α is the....
2024-09-05The value oflog29212log2log29×(7)1log47___________....
2024-09-05The least value of the expression2log10x-logx(0.01), forx>1,....
2024-09-05(i) Find the equation of the plane passing through the points \\((2,1,0),(5,0,1)\\) and \\((4,1,....
2024-09-05Consider any set of 201 observations x1,x2,…,x200,x201. It is given that x1<x2<&hel....
2024-09-05A plane is parallel to two lines whose direction ratios are \\((1,0,-1)\\) and \\((-1,1,0)\\) an....
2024-09-05\\(T\\) is a parallelopiped in which \\(A, B, C\\) and \\(D\\) are vertices of one face and the ....
2024-09-05If the straight lines \\(\\frac{x-1}{2}=\\frac{y+1}{k}=\\frac{z}{2}\\) and \\(\\frac{x+1}{5}=\\f....
2024-09-05Find the equations of the plane containing the lines \\(2 x-y+z-3=0\\), \\(3 x+y+z=5\\) and at a....