A uniform metal plate shaped like a triangle ABC has a mass of 540 gm. the length of the sides AB, BC and CA are 3 cm, 5 cm and 4 cm, respectively. The plate is pivoted freely about the point A . What mass must be added to a vertex , so that the plate can hang with the long edge horizontal ?A. 140 gm at CB. 540 gm at CC. 140 gm at BD. 540 gm at B

A uniform metal plate shaped like a triangle ABC has a mass of 540 gm.

1.	A uniform metal plate shaped like a triangle ABC has a mass of 540 gm. the length of the sides AB, BC and CA are 3 cm, 5 cm and 4 cm, respectively. The plate is pivoted freely about the point A . What mass must be added to a vertex , so that the plate can hang with the long edge horizontal ?A. 140 gm at CB. 540 gm at CC. 140 gm at BD. 540 gm at B
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