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# all surfaces are smooth string is light and pulley is frictionless

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## All surface are smooth, string is light and pulley is frictionless. Mark the correct statement

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Class 11 >>Physics >>Laws of Motion

>>Application of Newton's Laws of Motion

>>All surface are smooth, string is light

Question

## All surface are smooth, string is light and pulley is frictionless. Mark the correct statement

This question has multiple correct options

AAcceleration of block A is 1m/s

2

B

C

D

## Tension in string between pulley and wall is 15N

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Updated on : 2022-09-05

Solution Verified by Toppr

Correct options are A) and B)

There will be no horizontal force on C so its accelaration is zero.

Only force acting on B is Tension.

Forces acting on A are F and Tension.

A and B are attached to an inextensible string so both have same acceleration.

acceleration of A and B =

10+5 15 ​ =1m/s 2

12 3

स्रोत : www.toppr.com

## SOLVED:In the figure below, all surfaces are smooth, string is light and pulley is frictionless. Mark the correct statement(s). (1) Acceleration 01 block A is 1  m / s^2 (2) Acceleration of block A and B will be same (3) Acceleration of block C is zero (4) Tension in string between pulley and wall is 10  N.

VIDEO ANSWER: In the figure below, all surfaces are smooth, string is light and pulley is frictionless. Mark the correct statement(s). (1) Acceleration 01 block A is 1 \mathrm{~m} / \mathrm{s}^{2} (2) Acceleration

## All surfaces are smooth, string is light, and the pulley is frictionless. What does this mean? Is this a situation of equilibrium or will there be acceleration?

Answer (1 of 4): Hi, Actually in physics this is called an Ideal system. Actually, conditions like absence of air resistance, light and inextensible string, frictionless and massless pulleys, smooth contact surfaces, etc. are assumed because it helps to simplify calculations in questions as the...

All surfaces are smooth, string is light, and the pulley is frictionless. What does this mean? Is this a situation of equilibrium or will there be acceleration?

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Sort Tushar Pandey

Studied Electrical Engineering1y

This is actually the ideal case generally considered in the problems we are used to solve.

Surfaces are smooth- This simply mean that no frictional forces are acting on objects moving in contact with any surface. Or we can say that friction coefficient, μ= 0.

String is light- This means that mass per unit length of the rope= 0. If the string used is massive then the tension depends on its mass too.

Pulley is friction less- This is same as the point 1. Here it is saying that pulley rotates freely on the fulcrum. And there is no friction between the rope and groove of the pulley.

Equilibrium is the

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Steve Beresford

B.Tech, Computer Science Engineering from Indian Institute of Technology, Bombay (IITB)1y

Hi,

Actually in physics this is called an Ideal system.

Actually, conditions like absence of air resistance, light and inextensible string, frictionless and massless pulleys, smooth contact surfaces, etc. are assumed because it helps to simplify calculations in questions as these factors affect the accelerations, velocities of bodies otherwise the questions will become very complex. However in real life, ideal conditions do not exist naturally.

Coming to the latter part of the question, it is not necessary that there is a situation of equlibrium or acceleration. It just means that you have to cal

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Jeremiah Johnson

Physics TheoristUpvoted by

, M.Sc. Physics & Education, Norwegian University of Science and Technology (2002) and

KUMAR RISHABH

, Integrated M.Sc. (Hons.) Physics & Mechanical Engineering, Birla Institute of Technology and Science, Pilani …Updated 2y

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This statement seems to be part of a physics question that you were given. It means that you can neglect the mass of the string and friction at the surface / pulley while solving the problem.

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Related

Is downward acceleration negative?

That’s up to you to decide when you set up the frame of reference for whatever you’re describing.

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Mohammed 2 month ago

Guys, does anyone know the answer?