Home
Class 11
PHYSICS
A boy of mass 40kg is climbing a vertica...

A boy of mass 40kg is climbing a vertical pole at a constant speed.If the coefficient of friction between his palms and the pole is 0.8 and `g=10m/s^(2)` ,the horizontal force that he is applying on the pole is?

A

300 N

B

400 N

C

500 N

D

600 N

Text Solution

Verified by Experts

The correct Answer is:
C
Since , Frictional force (f) = mg
`implies mu N = mg`
`implies N = (40 xx 10)/(0.8) = 500 N`
`F = N = 500` N
Promotional Banner

Topper's Solved these Questions

  • FRICTION

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Kinetic Friction )|20 Videos

  • FRICTION

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Motion on Inclined Surface )|11 Videos

  • FLUID MECHANICS

    ERRORLESS|Exercise ASSERTION AND REASON|23 Videos

  • GRAVITATION

    ERRORLESS|Exercise Assertion and Reason |25 Videos

Similar Questions

Explore conceptually related problems

A boy of mass 50 kg is climbing a vertical pole at a constant speed. If coefficient of fricition between his palms and the pole is 0.75, then the normal reaction between him and the pole is ("take "=10m//s^(2))

A lineman of mass 60 kg is holding a vertical pole . The coefficient of the static friction between his hands and the pole is 0.5 . If he is able to climb up the pole , what is the minimum force with which he should press the pole with his hands ? ( g = 10 m//s^(2) )

A block of mass 5 kg is lying on a rough horizontal surface. The coefficient of static and Kinetic friction are 0.3 and 0.1 and g=10m//s^(-2) If a horizontal force of 50N is applied on the block, the frictional force is

A block of mass 1kg is pressed against a wall by applying a horizontal force of 10N on the block. If the coefficient of friction between the block and the wall is 0.5 ,magnitude of the frictional force acting on the block is

A block of mass 0.1 kg is held against a wall by applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the wall is 0.5, then the magnitude of the frictional force acting on the block is

A man holds a 2 kg book between his palms so that each hand exerts the same horizontal force on the book.The coefficient of static friction between the palms and the book is 0.4 and g= 10m s^(-2) .If the book is prevented from falling,the least force exerted by each hand on the book is ?