# Physics

A uniform metre rule of mass 90g is pivoted at the 40cm mark. If the rule is in equilibrum with an unknown mass, M placed at the 10cm mark and 72g mass at the 70cm mark, determine M.

1. 👍 1
2. 👎 0
3. 👁 297
1. sum moments about the piviot;
90(50-40)+72(70-40)+M(10-40)=0
solve for M

1. 👍 1
2. 👎 0
👨‍🏫
bobpursley
2. Please explain how and why bobpursley

1. 👍 1
2. 👎 0

## Similar Questions

1. ### HISTORY

To rule his empire successfully, Hammurabi instructed his own governors A to teach local rulers B to rule distant cities C to train his sons to rule. B to cut off communication with the outside world

2. ### History

To rule his empire successfully, hammurabi instructed his own governors__________. A.To teach local rulers. B.To rule distant cities. C.To train his sons to rule. D.To cut off communication with the outside world. I think its B

3. ### Science

A uniform have metre rule,pivoted at 20cm mark balances horizontally when a mass of 50g is suspended from 4cm mark calculate the mass of the metre rule.

4. ### Physics

A metre rule is found to be balanced at 48 cm mark when body of mass 60g is suspended at the 6cm mark , the balance point is found to be at 30cm mark.calculate the metre rule the distance of the balance point from the zero end if

1. ### physics

A uniform metre rule of mass 90g is pivoted at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark,determine m.

2. ### science

A uniform meter rule is balance at 30cm mark when of 50grams is hanging from its zero cm mark.calculate the weight of the rule?

3. ### Physics

A uniform meter rule of mass 100g balance at a 40cm mark when a mass x is placed at the 10cm mark.What is x?

4. ### Physics

A uniform metre rule AB us balanced on a knife edge which is 55cm from B. If a mass of 10g is hung at P, which is 10cm from A, calculate the mass of the metre rule. Please HELLLLP

1. ### Science

A uniform half metre rule is balanced horizontally across a knife edge placed 20cm from A. A mass of 22.5g is hung from end A. 1. What is the mass of the rule 2. What is the force exerted on the rule by the knife edge?

2. ### Physics

a uniform metre rule pivoted at R, the 70cm mark. Two forces 0.1 N and 0.4 N are applied at Q, the 60cm mark and S, the 85cm mark. If the metre rule us kept in equilibrium, by the forces, calculate the weight of the metre rule.

3. ### Physics

A uniform metre rule of Mass 120g is pivoted at 60cm Mark. At what point on metre rule should a mass of 50g be suspended for it to balance horizontally

4. ### Physics

A uniform half metre rule is freely pivoted at the 15cm Mark and it balanced horizontally when a body of mass 40g is hung from the 2cm Mark. calculate the mass of the rule