For a seesaw with four seats A,B,D,E and fulcrum at C, AC = EC = 2 m and BC = DC = 1 m. Class 9

For a seesaw with four seats A,B,D,E and fulcrum at C, AC = EC = 2 m and BC = DC = 1 m. Class 9

Question 1.

For a seesaw with four seats A,B,D,E and fulcrum at C, AC = EC = 2 m and BC = DC = 1 m. On which seats children of mass 15 kg and 30 kg sit to balance the seesaw?

Answer:

Let the child of mass 15 kg sit at seat A and child of mass 30 kg sit at distance L from the fulcrum.

In a lever, Load × Load arm = Effort × Effort arm 15 × 2 = 30 × L; L = 1 m

Thus, child of mass 30 kg to sit at seat D