Find the reading of spring balance as shown in figure. Assume that mass $M$ is in equilibrium and all surfaces are smooth.

8 N

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9 N

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12 N

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Solution

The correct option is C 12 N

$N = mg cos 37^{\circ}$
$N = 2.5 \times 10 \times \frac{4}{5}$
$N = 20 N$
Reading of spring balance (R),
$R = N cos 53^{\circ}$
$R = 20 \times \frac{3}{5}$
$R = 12 N$

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Find the reading of spring balance as shown in figure. Assume that mass M is in equilibrium and all surfaces are smooth.

The correct option is C 12 N N=mg cos37∘ N=2.5×10×45 N = 20 N Reading of spring balance (R), R=N cos53∘ R=20×35 R = 12 N

Find the reading of spring balance as shown in figure. Assume that mass $M$ is in equilibrium and all surfaces are smooth.

The correct option is C 12 N

$N = mg cos 37^{\circ}$
$N = 2.5 \times 10 \times \frac{4}{5}$
$N = 20 N$
Reading of spring balance (R),
$R = N cos 53^{\circ}$
$R = 20 \times \frac{3}{5}$
$R = 12 N$