Find the reading of spring balance as shown in the figure (a 2.5 kg block on the smooth 37 ∘ incline of wedge M , the spring balance holding the wedge). Assume that mass M is in equilibrium: (Take g =

Question

Find the reading of spring balance as shown in the figure (a 2.5 kg block on the smooth 37 ∘ incline of wedge M , the spring balance holding the wedge). Assume that mass M is in equilibrium: (Take g = 10 m/s², sin 37 ∘ = 0.6 , cos 37 ∘ = 0.8 )

TestHub · Accepted Answer

The block presses on the incline with N = m g cos 37 ∘ = 2.5 × 10 × 0.8 = 20 N . The horizontal component of this force on the wedge is N sin 37 ∘ = 20 × 0.6 = 12 N , which the spring balance must balance. Option C.

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