Two masses `m_1=5kg` and `m_2=4.8kg` tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when left free to move?

Options

A. (a) `5m//s^2`
B. (b) `9.8m//s^2`
C. (c) `0.2m//s^2`
D. (d) `4.8m//s^2`

Answer

C

Explanation

Acceleration `a=((m_1-m_2)/(m_1+m_2))g`
`=((5-4.8)xx9.8)/(5+4.8)m//s^2=0.2m//s^2`