Two blocks of mass 4 kg and 6 kg are attached to the ends of a string passing over a pulley. The 4 kg mass is attached to the table by another string. The tension in this string `T_1` is

Options

A. `19.6 N`
B. `25 N`
C. `10.6 N`
D. `10 N`

Answer

A

Explanation

For block of mass 6 kg,
T = 6g = 6 `xx` 9.8 = 58.8 N
For block of mass 4 kg,
`T-T_1 , -4g = 4 xx 9.8 = 39.2 N `
or` T_1 =T - 39.2 = 58.8 - 39.2 = 19,6 N `