An object of mass \( m \) slides down a hill of arbitrary shape and after travelling a certain h...

Channel:
PW Solutions
Subscribers:
443,000
Published on ● Video Link: https://www.youtube.com/watch?v=lbhc9jgsXHc


Duration: 2:20
47 views
1

An object of mass \( m \) slides down a hill of arbitrary shape and after travelling a certain horizontal path stops because of friction. The total vertical height descended is \( h \). The friction coefficient is different for different segments for the entire path but is independent of the velocity and direction of motion. The work that a tangential force must perform to return the object to its initial position along the same path is
(1) \( m g h \)
(2) \( -m g h \)
(3) \( -2 m g h \)
(4) \( 2 m g h \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-10-27The blocks \( A \) and \( B \) shown in figure have masses \( M_{A}=5 \mathrm{~kg} \) and \( M_{...
2022-10-27A projectile is fired with some velocity making certain angle with the horizontal. Which of the ...
2022-10-27In the above question, the average power delivered by gravity is (1) \( -m g u \cos \alpha \) (2...
2022-10-27The system shown in figure is released from rest with mass \( 2 \mathrm{~kg} \) in contact with ...
2022-10-27A particle of mass \( m \) is projected at an angle a to the horizontal with an initial velocity...
2022-10-27A particle located in a one-dimensional potential field has its potential energy function as \( ...
2022-10-27A body is moved along a straight line by a machine delivering a constant power. The distance mov...
2022-10-27A massless platform is kept on a light elastic spring as shown in figure. When a particle of mas...
2022-10-27A pump motor is used to deliver water at a certain rate from a given pipe. To obtain \( n \) tim...
2022-10-27A spring is compressed between two toy carts of masses \( m_{1} \) and \( m_{2} \). When the toy...
2022-10-27An object of mass \( m \) slides down a hill of arbitrary shape and after travelling a certain h...
2022-10-27The speed \( v \) reached by a car of mass \( m \) in travelling a distance \( x \), driven with...
2022-10-27A car drives along a straight level frictionless road by an engine delivering constant power. Th...
2022-10-27A mass \( M \) is lowered with the help of a string by a distance \( h \) at a constant accelera...
2022-10-27A moving railway compartment has a spring of constant \( k \) fixed to its front wall. A boy str...
2022-10-27A rope ladder of length \( L \) is attached to a balloon of mass \( M \). As the man of mass \( ...
2022-10-27A motor boat is to reach at a point \( 30^{\circ} \) upstream on the other side of a river flowi...
2022-10-27A block \( m \) is kept stationary on the surface of an accelerating cage as shown in figure. At...
2022-10-27One end of an unstretched vertical spring is attached to the ceiling and an object attached to t...
2022-10-27A shell fired from the ground is just able to cross horizontally the top of a wall \( 90 \mathrm...
2022-10-27A heavy weight is suspended from a spring. A person raises the weight till the spring becomes sl...


Tags:
pw