KVPY SX SB Exam 2018 Question Paper

Question : 92 of 120

Marks: +1, -0

An arrangement of spring, strings, pulley and masses is shown in the figure. The pulley and the strings are massless and M > m. The spring is light with sprig constant k. If the string connecting m to the ground is detached, then immediately after detachment

the magnitude of the acceleration of m is zero and that of M is g
the magnitude of the acceleration of m is (M – m)g/m and that of M is zero.
the accelerations of both masses are same
the elongation in the spring is (M – m)g/k

Validate

Solution:

After string is cut :
Acceleration of ‘m’

a={T-mg}/m={(M-m)g}/m\;\;(T = mg)

Acceleration of ‘m’

a={Mg-Mg}/M=0

Go to Question:

Prev Question

Next Question