Student Login

Home›Chapters›Laws of Motion PYQs›Connected Bodies & Pulleys›Question 41

JEE Main 2007 (AIEEE) · Connected Bodies & Pulleys

Connected Bodies & Pulleys question from JEE Main 2007 (AIEEE)

Q41JEE Main 2007 · AIEEEMedium

Connected Bodies & Pulleys

A block of mass $m$ is connected to another block of mass $M$ by a spring (massless) of spring constant $k.$ The blocks are kept on a smooth horizontal plane. Initially the blocks are at rest and the spring is unstretched. Then a constant force $F$ starts acting on the block of mass $M$ to pull it. Find the force on the block of mass $m.$

Show answer and solution

Answer: (d)

Treat both blocks as moving with a common acceleration $a = \dfrac{F}{m+M}$ .
The only horizontal force on $m$ is the spring force, so $F_m = ma$ .
$F_m = \dfrac{mF}{m+M}$
So the answer is (d) $\dfrac{mF}{(m+M)}$ .

Report a mistake

More questions on Connected Bodies & Pulleys

A block is kept on a frictionless inclined surface with angle of inclination 'α'. The…JEE Main 2005 (AIEEE)
Two masses m₁ = 5 kg and m₂ = 4.8 kg tied to a string are hanging over a light…JEE Main 2004 (AIEEE)
A block of mass m is placed on a smooth wedge of inclination θ. The whole system is…NEET 2004 (AIPMT)
A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m…JEE Main 2003 (AIEEE)
A light spring balance hangs from the hook of the other light spring balance and a block…JEE Main 2003 (AIEEE)
Three identical blocks of masses m = 2 kg are drawn by a force F = 10.2 N with an…JEE Main 2002 (AIEEE)
A light string passing over a smooth light pulley connects two blocks of masses m₁ and m₂…JEE Main 2002 (AIEEE)
250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then…NEET 2001 (AIPMT)