Two blocks of masses m and `M` are connected by an inextensible light string as shown in the figure. When a constant horizontal force `F` acts on the block of the mass `M`, then tension in the string is : (Assume that constact between the ground and the two blocks are frictionless) and blocks will not topple. (Given: `m = 1 kg, M = 4 kg, F = 10 N, theta = 60^(@)`)

Options

A. `1N`
B. `2N`
C. `4N`
D. `3N`

Answer

C

Explanation

Two blocks of …………
Acceleration of system, `a = (F)/(M+m)`
Acceleration of mass m is also 'a', then
`T cos theta = ma`
`T = (ma)/(cos theta) = (mF)/((M+m)cos theta) = (1xx10xx2)/((4+1)xx1) = 4N`