A block of mass 2 kg is kept at rest on a smooth inclied plane as shown in (a) with the help of a string Find the tension in the string and reaction on the block if the string is cut, find the acceleration of the block neglecting friction.

Answer

`T=9.8 N; R= 17 N and a=4.9m//s^(2))`

Explanation

(a)
`T' = Mg sin 30^(@) = 2xx9.8xx1/2=9.8N`
(b) if string is cut then
`Mg sin 30^(@) =Ma`
`a=9.8xx1/2=4.9m//sec^(2)`
`R=Mg cos 30^(@)=2xx9.8xxsqrt(3)/2=17N`