Please help. Q28. Asap need it

The mass of the counterweight is 0.6 kg

Explanation:

From the artists sculpture and the description, we have;

The location of the center of mass, M, of the bird = 12 cm left horizontally from the pivot

The location, E, where the counter weight is to be added = 30 cm right horizontally from the pivot

The mass of the bird = 1.5 kg

Let x represent the mass of the counterweight

For equilibrium, taking the sum of moment about point A as 0, with the anticlockwise moment also taken as negative, we have;

Moment about a point = Mass × The acceleration due to gravity, g × Perpendicular distance from the point

x × g × 30 cm - 1.5 kg × g × 12 cm = 0

x × 30 cm = 1.5 kg × 12 cm

x = 1.5 kg × 12 cm /30 cm = 0.6 kg

x = 0.6 kg.

The mass of the counterweight = x = 0.6 kg

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

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