A small block of mass \( m \) is kept on a rough inclined surface of inclination \( \theta \) fi...

Channel:
Subscribers:
449,000
Published on ● Video Link: https://www.youtube.com/watch?v=4PBRiluEzFo



Duration: 5:53
33 views
1


A small block of mass \( m \) is kept on a rough inclined surface of inclination \( \theta \) fixed in a elevator. The elevator goes up with a uniform velocity. \( v \) and the block does not slide on the wedge, The work done by the force of friction on the block in time \( t \) will be :
(A) Zero
(B) \( m g v t \cos ^{2} \theta \)
(C) \( m g v t \sin ^{2} \theta \)
(D) \( m g v t \sin 2 \theta \)
๐Ÿ“ฒPW App Link - https://bit.ly/YTAI_PWAP
๐ŸŒPW Website - https://www.pw.live




Other Videos By PW Solutions


2022-10-28A pendulum of mass \( 1 \mathrm{~kg} \) and length \( l=1 \mathrm{~m} \) is released from rest a...
2022-10-28A particle is displaced from \( x=-6 \mathrm{~m} \) to \( x=+6 \mathrm{~m} \). A force \( F \) a...
2022-10-28A man throws the bricks to a height of \( 12 \mathrm{~m} \) where they reach with a speed of \( ...
2022-10-28Two particles 1 and 2 are allowed to descend on two frictionless chords \( O P \) and \( O Q \)....
2022-10-28System shown in figure-3.99 is released from rest. Pulley and spring is massless and friction is...
2022-10-28A particle is given an initial speed \( u \) inside a smooth spherical shell of radius \( R=1 \m...
2022-10-28A particle moves on a rough horizontal ground with some initial velocity say \( v_{0} \). If \( ...
2022-10-28A particle of mass \( m \) is projected with velocity \( u \) at an angle \( \alpha \) with hori...
2022-10-28A particle moves with a speed \( v \) in a circle of radius \( R \). The \( x \)-component of th...
2022-10-28Water is pumped from a depth of \( 10 \mathrm{~m} \) and delivered through a pipe of cross secti...
2022-10-28A small block of mass \( m \) is kept on a rough inclined surface of inclination \( \theta \) fi...
2022-10-28A particle of mass \( m_{1} \) is fastened to one end of a string and one of \( m_{2} \) to the ...
2022-10-28A ball of mass \( 1 \mathrm{~kg} \) moves inside a smooth fixed spherical shell of radius \( 1 \...
2022-10-28A \( 10 \mathrm{~kg} \) ball attached to the end of a rigid massless rod of length \( 1 \mathrm{...
2022-10-28Two equal masses are attached to the two ends of a spring constant \( k \). The masses are pulle...
2022-10-28In a simple pendulum, the breaking strength of the string is double the weight of the bob. The b...
2022-10-28A block of mass \( 4 \mathrm{~kg} \) is resting on a horizontal table and a force of \( 10 \math...
2022-10-28A block of mass \( m \) is attached to the two springs in vertical plane as shown in the figure\...
2022-10-28A simple pendulum having a bob of mass \( m \) is suspended from the ceiling of a car used in a ...
2022-10-28A rod of length \( L \) is pivoted at one end and is rotated with a uniform angular velocity in ...
2022-10-28The work done in moving a particle from a point \( (1,1) \) to \( (2,3) \) in a plane and in a f...



Tags:
pw