Consider a drop of rainwater having a mass of \( 1 \mathrm{gm} \) falling from a height of \( 1 ....

Channel:
PW Solutions
Subscribers:
451,000
Published on ● Video Link: https://www.youtube.com/watch?v=l4lO2sCgHQg


Duration: 1:54
2 views
0

Question Consider a drop of rainwater having a mass of \( 1 \mathrm{gm} \) falling from a height of \( 1 \mathrm{~km} \). It hits the ground with a speed of \( 50 \mathrm{~m} / \mathrm{s} \). Take \( \mathrm{g} \) constant with a value \( 10 \mathrm{~m} / \mathrm{s}^{2} \). The work done by the (i) Gravitational force and the (ii) Resistive force of air is
(A) (i) \( 1.25 \mathrm{~J} \) (ii) \( -8.25 \mathrm{~J} \)
(B) (i) \( 100 \mathrm{~J} \) (ii) \( 8.75 \mathrm{~J} \)
(C) (i) \( 10 \mathrm{~J} \) (ii) \( -8.75 \mathrm{~J} \)
(D) (i) \( -10 \mathrm{~J} \) (ii) \( -8.75 \mathrm{~J} \)šŸ“²PW App Link - https://bit.ly/YTAI_PWAP šŸŒPW Website - https://www.pw.live



Other Videos By PW Solutions


2024-01-29A pump is used to deliver water at a certain rate from a given pipe. To obtain \( n \) time....
2024-01-29The centre of mass of a system of particles does not depend on:....
2024-01-29A particle moves with the velocity \( \vec{v}=(5 \hat{i}+2 \hat{j}-\hat{k}) \mathrm{ms}^{-1} \) ....
2024-01-29A man is riding on a cycle with velocity \( 7.2 \mathrm{~km} / \mathrm{hr} \) up a hill having a....
2024-01-29A motor of \( 100 \mathrm{hp} \) is moving a car with a constant velocity of \( 72 \mathrm{....
2024-01-29Stone tied at one end of light string is whirled round a vertical circle. If the difference....
2024-01-29An electric motor produces a tension of \( 4500 \mathrm{~N} \) in a load lifting cable and ....
2024-01-29A fighter plane is moving in a vertical circle of radius \( r \) . Its minimum velocity at the h....
2024-01-29If \( 250 \mathrm{~J} \) of work is done in sliding a \( 5 \mathrm{~kg} \) block up an incl....
2024-01-29A bullet of mass \( 20 \mathrm{~g} \) leaves a riffle at an initial speed \( 100 \mathrm{~m} / \....
2024-01-29Consider a drop of rainwater having a mass of \( 1 \mathrm{gm} \) falling from a height of \( 1 ....
2024-01-29Which of the following remains constant for an isolated system?....
2024-01-29If a spring extends by \( x \) on loading then energy stored by the spring is ( \( T \) is tensi....
2024-01-29A ball of mass \( 1 \mathrm{~kg} \) is released from the tower of Pisa. The kinetic energy gener....
2024-01-29A force acts on a \( 30 \mathrm{~g} \) particle in such a way that the position of the particle ....
2024-01-29An object of mass \( 2 \mathrm{~kg} \) falls from rest through a vertical distance \( 10 \mathrm....
2024-01-29A \( 0.5 \mathrm{~kg} \) ball is thrown up with an initial speed 14 \( \mathrm{m} / \mathrm{s} \....
2024-01-29A light and a heavy body have equal momenta.Which one has greater K.E....
2024-01-29Work energy theorem is valid in....
2024-01-29If the increase in the kinetic energy of a body is \( 22 \% \), then the increase in the momentu....
2024-01-29A particle of mass \(0.01 \mathrm{~kg}\) travels with velocity given by \(4 \hat{i}+16 \hat{k} \....