Home
Class 11
PHYSICS
A lift is moving down with an accelerati...

A lift is moving down with an acceleration equal to the acceleration due to gravity. A body of mass `M` kept on the floor of the lift is pulled horizontally If the coefficient of friction is `mu` then the frictional resistance offered by the body is .

A

m g

B

`mu` mg

C

`2 mu mg`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
`g_("eff") = g - g. = g - g = 0`
`f = mu mg_("eff") = 0`
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 body of mass m kept on the floor of a lift moving downwards is pulled horizontally. If mu is the coefficient of friction between the surface in contact, then

A lift is moving downwards with an acceleration equal to g . A block of mass m , kept on the floor of the lift of friction coefficient mu , is pulled horizontally . The friction acting on the block is

In the above question, if the lift is moving upwards with a uniform velocity, then the frictional resistance offered by the body is

A block of mass 2 kg is kept on a rough horizontal floor an pulled with a force F. If the coefficient of friction is 0.5. then the minimum force required to move the block is :-

A lift moving up with an acceleration equal to 1/2th of that due to gravity. What is the apparent weight of a 80 kg man standing in the lift?

A block of mass m is kept on a horizontal table. If the static friction coefficient is mu ., find the frictional force acting on the block.

A lift is moving downwards. A body of mass 2 kg kept on the floor is pulled horizontally and is in motion. If the coefficient of friction between the body and floor is 1 // 2 , find the friction acting on the body if (a) lift is moving with a uniform velocity and (b) lift is moving with acceleration 5 m//s^(2) in the downward direction.