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

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

A man weighing 1200 N sits 2.0 m to the left of the center of a see-saw. His 1 point friend weighs 1100 N and sits on the opposite side, 1.8 m from the center, to which direction will the see-saw turn?  Counterclockwise Clockwise No movement Clockwise then counterclockwise

Two cones have their heights in the ratio 1:3 and radii in the ratio 3:1. What is the ratio of their volumes?

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?

The diagram shows a uniform bar supported at the middle point O. A weight of 40 gf is placed at a distance 40cm to the left of the point O. How can you balance the bar with a weight of 80 gf? 50 40 gf 40 30 20 10 10 20 30 40 O 50 cm

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 .

A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 3.81 g coins stacked over the 13.2 cm mark, the stick is found to balance at the 28.4 cm mark. What is the mass of the meter stick? Number Units

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