4 cm 8 cm 5 cm 1 cm M 2 cm 4 cm 5g In the figure, what mass M is required to balance the mobile? 60 g ○ 36 g 30 g 18 g ○ 90 g

Three children are trying to balance on a seesaw.  The seesaw is 4.1 m long and pivots about a rock at its center.  Louie and Laura are already sitting on opposite ends.  If Martha weighs 33 kg, where should she sit so as to balance the seesaw?

A 20 kg child and a 30 kg child are sitting on an 4 m long see-saw. Where should the fulcrum be placed so the two children balance?   2.2 m from the 30 kg child 2.4 m from the 20 kg child 1.2 m from the 20 kg child 3 m from the 30 kg child

Three children are playing on a seesaw. The largest child has a mass of 50 kg and sits on the right side of the seesaw 0.9 m from the fulcrum. The middle child has a mass of 40 kg and sits on the left side of the seesaw 2.5 m from the fulcrum. Where does the smallest child, who has a mass of 25 kg, need to sit in order to balance the seesaw?

400 4 The amount of mass shown on the triple beam riders is – F 401.4 g G 404.5 g H 414.5 g J 444.5 g cm 0 2 3 4 6. 7 8 9 10 11 12 13 14 15 What is the length of the metal rod? A 7.0 cm B 7.5 cm C 8.0 cm D 8.5 cm

Big Sister and Little Brother are balanced on a see-saw.  Big Sister sits a distance of 1.13m away from the center of the see-saw and Little Brother sits a distance of 1.97m away from the center of the see-saw.  The total mass of the two children is 57.0kg.  Little Brother has a mass of __________kg .

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A wooden plank of length 240 cm lies on the edge of a crate with 80 cm hanging over the crates edge. A cat with a mass of 4.0kg walks to the very edge just before she tips the plank over. What is the mass of the plank?

The figure shows a set of blocks, each with identified masses. Estimate where a pivot should be placed beneath the lowest block so that the system would balance in equilibrium. 1.5 m 6 kg 5 kg 2 kg 2 m O 0-- 0.5 m 0.5 -- 1 m O 1-- 1.5 m O 1.5 -- 2 m

A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 6.35 g coins stacked over the 11.5 cm mark, the stick is found to balance at the 43.4 cm mark. What is the mass of the meter stick?