JEE Main Physics question
Two masses m₁ = 5 kg and m₂ = 4.8 kg tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when the lift (pulley support) is free to move? [AIEEE 2004]
Answer: (A)
Solution
a = (m₁−m₂)g/(m₁+m₂) = (0.2×9.8)/9.8 = 0.2 ms⁻².