Multiple choice

A string over a smooth massless pulley connects two blocks of masses m1 & m2 (vertically). If the acceleration of the system is (g/10), then the ratio of masses is

  1. 8 : 1

  2. 9 : 7

  3. 11 : 9

  4. 3 : 5

  5. 5 : 3

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The acceleration of the system is The acceleration of the system is a = (m1 - m2)g / (m1 + m2) = g / 10 (m1 - m2) / (m1 + m2) = 1 / 10 10m1 - 10m2 = m1 + m2 9m1 = 11m2 m1 / m2 = 11 / 9