A block A of mass m1 rests on a horizontal table. A light string… | NEET 2015 (AIPMT, Cancelled Paper)

Q26NEET 2015 · AIPMT · CANCELLED PAPERMedium

Friction Basics

A block A of mass m1 rests on a horizontal table. A light string connected to it passes over a frictionless pully at the edge of table and from its other end another block B of mass m2 is suspended. The coefficient of kinetic friction between the block and the table is $\mu$ k. When the block A is sliding on the table, the tension in the string is

Show answer and solution

Answer: (a)

Block B: $m_2 g - T = m_2 a$ ; block A: $T - \mu_k m_1 g = m_1 a$ .
Adding: $a = \dfrac{(m_2 - \mu_k m_1)g}{m_1 + m_2}$
$T = m_2(g - a) = m_2 g\,\dfrac{m_1 + \mu_k m_1}{m_1 + m_2}$
So the answer is (a) $T = \dfrac{m_1 m_2(1+\mu_k)g}{m_1+m_2}$ .

Report a mistake

More questions on Friction Basics

A system consists of three masses m1, m2 and m3 connected by a string passing over a…NEET 2014 (AIPMT)
A heavy box is to be dragged along a rough horizontal floor. To do so, person A pushes it…JEE Main 2014 (19 Apr, Shift 1)
A block is placed on a rough horizontal plane. A time dependent horizontal force F = kt…JEE Main 2013 (25 Apr, Shift 1)
A conveyor belt is moving at a constant speed of 2 ms ⁻ 1. A box is gently dropped on it…NEET 2011 (AIPMT, Mains)
A block B is pushed momentarily along a horizontaly surface with an initial velocity V…NEET 2007 (AIPMT)
Consider a car moving on a straight road with a speed of 100 m/s. The distance at which…JEE Main 2005 (AIEEE)
The coefficient of static friction, μ s, between block A of mass 2 kg and the table as…NEET 2004 (AIPMT)
A horizontal force of 10 N is necessary to just hold a block stationary against a wall…JEE Main 2003 (AIEEE)

Friction Basics question from NEET 2015 (AIPMT, Cancelled Paper)

More questions on Friction Basics