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M*g = 30 * 10 = 300 N. = Force of the body.
Fp = 300*sin60 = 260 N. = force parallel with the plane.
Fn = 300*Cos60 = 150 N. = normal force.
Ff = u*Fn = 0.3 * 150 = 45 N. = Force of friction.
1. Compression = 260N. * 1m/350N = 0.74 m.
2. Compression = (Fp-Ff) * 1/k = (260-45)N. * 1m/350N = -----m.