We have two masses balanced on a centered beam on a fulcrum. If m1 = 10 kg, and m2 = 20 kg, what should the length of the lever arm, r2, be to keep everything balanced when r1 = 10 meters?

Q: * A person is sitting with oneleg outstretched and stationary,so that it makes an angle of 30.08…

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Q: A board sits in equilibrium. On the left end, there is a wire that supports the board from the…

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Q: A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40.0-kg child…

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Q: A homogeneous, 10 m-long beam has a total weight of 80N and is divided to 10 equal segments. Object…

A: Given:- A homogeneous, 10 m-long beam has a total weight of 80 N and is divided into 10 equal…

Q: The bones of the forearm (radius and ulna) are hinged to the humerus at the elbow. The biceps muscle…

A: By Balancing torque about elbow joint

Q: We are going to look at having two hanging masses on the right: 1.50 kg at 0.30 meters from the…

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Q: A load of 50 gm is placed at 20cm on a meter stick supported at the center. Where will a 70 gm load…

A: Given data:  Mass (m1) = 55 gm placed at x1 = 20 cm Meter stick supported at center  Mass (m2) = 70…

Q: A uniform stick AB can be balanced on a knife edge 10 cm from one end when a weight of 200N is hung…

A: #  First case               So FBD of this           g = 10 m/s2   So MAP = 10 cml×w  (total weight)…

Q: The boom in the figure is 2m long and weighs 100 N. If the 800N load is suspended 50cm from the end,…

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Q: A maintenance technician uses a uniform ladder of 3 m long and weighs 200 N. It is placed against a…

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Q: A uniform meter stick of mass M has an empty paint can of mass mm hanging from one end. The meter…

A: The center of mass of rod is 50 cm from the can and 50-23=27 cm on the other side of balance point.

Q: A uniform 20 kg wooden plank is supported by a fulcrum at the midpoint.  From the fulcrum, a 30 kg…

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Q: Two children are playing on a seesaw trying to balance. If the child on the left sits 1.5 meters…

A: Given  m1 = 25 kg m2 = 35 kg Distance of 1st point from pivot = 1.5 m For balancing the seesaw , we…

Q: Two Boy Scouts, Bobby and Jimmy, are carrying a uniform wooden tent pole 4.20 m in length and having…

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Q: A 15.0 kg child and a 25 kg child sits at opposite ends of a 4 m see saw pivoted at its center.…

A: Given data: Mass of child at one end is, m1=15.0 kg. Mass of child at other end is, m2=25 kg. Length…

Q: The figure shows a uniform, horizontal beam (length = 10 m, mass = 25 kg) that is pivoted at the…

A: Given:   Length, L = 10 m Mass of rod, m =25 kg Mass of person, M = 60 kg Distance of person from…

Q: A 20 kg wooden plank is supported by a fulcrum at the midpoint. A 79 kg man is positioned 1.5 m from…

A: Given data:  Mass of wooden plank (m) = 20 kg Mass of man (m1) = 79 kg Distance of man from fulcrum…

Q: The uniform seesaw shown below is balanced on a fulcrum located 3.0 m from the left end. The smaller…

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Q: A 0.140 kg, 42.1-cm-long uniform bar has a small 0.055 kg mass glued to its left end and a small…

A: Given: Mass m1 = 0.140 kg Length l = 42.1 cm Mass m2 = 0.055 kg. Mass m3 = 0.150 kg x1 =…

Q: A 50.0 g mass is placed at the 20 cm mark in meterstick as shown in the figure. what is the mass of…

A: Given that:- 50gm mass is placed at 20cm mark at meterstick.

Q: A 2.0 – m uniform rod is 2.0 N. On one end is weight of 4 N (point A) while on the other is a load…

A: The torque exerted on an object with force and the distance from the axis perpendicular to each…

Q: A 20 kg child and a 30 kg child are sitting on an 4 m long see-saw. Where should the fulcrum be…

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Q: A 50.0 g mass is placed at the 20 cm mark in meterstick as shown in the figure. what is the mass of…

A: hanging mass = 50 g position of hanging mass = 20 cm mark mass of stick = M position of fulcrum =…

Q: ard 20 cm x 10 cm has a mass of 200 g. Masses of 50 and 80 g are attached at two corners at the ends…

A: Given values:- Dimension of uniform board,(L)=20 cm x 10 cm -----(1) Mass of uniform board,(M)=200…

Q: A 2.50 [kg] block is positioned 2.25 [m] from the center of a long uniform beam. At what distance x…

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Q: In the figure , the center of gravity (CG) of the pole held by the pole vaulter is 1.85 m from left…

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Q: Q9 The system in the figure is in equilibrium. A concrete block of mass 287 kg hangs from the end of…

A: GIVEN: mass of the concrete block M = 287kg mass of strut m= 33.6kg

Q: An irregularly shaped object 10 m long is placed with each end on a scale. If the scale on the right…

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Q: A uniform plank has mass M = 9 kg and length L = 4.0 m. A box of mass m = 2.2 kg rests on it at a…

A: Given data: The mass of the uniform plank, M=9 kg. The length of the plank, L=4.0 m. The mass of…

Q: Two children hold opposite ends of a lightweight, 1.8-m-long horizontal pole with a water bucket…

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Q: 2 m 1 m F E 1.5 m 1.5 m MA H G mc = 30 Kg MB

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Q: Based on this illustration, what must be the value of F1 to make the see-saw balanced? * F2 = 50N 3…

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Q: 2.0 m 1.0 m 4.0 kg 1.0 kg d

A: Mass of first object (M) = 1 kg Mass of second object (m)= 4 kg Length of first object = 2 m Center…

Q: A lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is…

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Q: Two plastic toys are hung from the ends of a uniform rod of mass 20.0 g and length 0.500 m to form a…

A: Mass of uniform rod (M) = 20 g Length of rod (L) = 0.50 m Mass of toy on left end (m) = 5 g mass of…

Q: A meter stick balances horizontally on a knife-edge at the 50.0 [cm] mark. If you put a stack of…

A: m'=15g m''=5 g

Q: A 5.0 kg cat and a 2.0 kg bowl of tuna fish are at opposite ends of a 4.0 m long seesaw. How far to…

A: In order to keep the seesaw in balance, the moment about the pivot point must be equal. Let the 4 Kg…

Q: A man and a child sit on a seesaw, as shown in the diagram. The seesaw consists of a plank with…

A: Torque equilibrium: When the system is in the static equilibrium than the total algebraic sum of…

Q: 30.0 cm Consider two identical, uniform, 30-cm-long wooden boards, stacked on top of each other, and…

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Q: A 2.0-m-long rod has a density in kilograms per meter A 1.0 kg/m, b = 1.0 k9/m² , and x is the…

A: Given, λ=a+bx, where a=1 kg and b=1.0 kg/m2  =1+xL=2.0 m Solution distance dx from the left end of…

Q: A wooden plank with a mass of 50.968 kg is supprted by two cable at its ends. At what location…

A: Given,Mass of the wooden block, M = 50.968 Nmass of the block, m =20.387Force on the one clabe is…

Q: A 700 N bear is standing on a metal plank supported by the cable shown in the figure. At the end of…

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Q: The hanging mobile pictured above consists of two masses, m1 and m2, suspended from a uniform 10 cm…

A: Given Mass m1 = 0.02 kg Mass mr = 0.01 kg Length of the rod L = 10 cm = 0.10 m

Q: Two children are playing on a seesaw trying to balance. If the child on the left sits 2 meters away…

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Q: Two plastic toys are hung from the ends of a uniform rod of mass 20.0 g and length 0.500 m to form a…

A:

Q: A uniform meter stick of mass M has an empty paint can of mass ?m hanging from one end. The meter…

A: Mass of the uniform meter stick = MMass of empty paint can = m

Q: A 32.0 kg child sits on one end of a long uniform beam having a mass of 18.0 kg, and a 40.0 kg child…

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Rotational Equilibrium And Rotational Dynamics

In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics. 

Equilibrium of Forces

The tension created on one body during push or pull is known as force.