A uniform stick can be balanced on a knife edge 10cm from one end when a load of 200N is hung from that end. When the knife edge is moved 5cm further from the end, the 200N load has to be moved to a point 8.75cm from the knife edge to obtain a balance. Find the length of the stick and its weight.

Q: A beam of negligible mass, supported by a hinge, holds two steel balls as shown in the figure.…

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Q: A meterstick is balanced on a fulcrum at its center.  Then a 310 N weight is placed 20 cm to the…

A: Given data:  Weight (W1) = 310 N Placed at (r1 ) = 20 cm, to the left of centre  Weight (W2) = 150 N…

Q: "A trap door in a ceiling is 0.91 m square, has a mass of 11 kg, and is hinged along one side, with…

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A: We will balance the torque : Fx1.4  = 76x9.8x0.15  F= 79.8 N

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Q: What are the forces applied to the board by the posts?

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Q: A 10 m ladder with a mass of 15 kg leans against the wall. If the ladder is in static equilibrium,…

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Q: A worker of weight 756.5 kg stands on the end of a beam of weight 1699 N and length L= 118.7 m,…

A: Given  Mass of worker =756.5kg Weight of beam =1699N L=118.7m X=26.7m

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Q: A 400-N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal,…

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Q: How much work was done by the person against Gravity?

A: Initially the center of mass is at a height, The center of mass ends at a height of

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Q: Two children of mass 20 kg and 30 kg sit balanced on a seesaw with the pivot point located at the…

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Q: A 6-m long ladder has a mass of 10 kg, and its center of  gravity is 2.4 m from the bottom along the…

A: Length of the ladder l=6 m, mass of ladder M=10 kg, mass of man m=70 kg, angle of friction is 15o…

Q: One end of a uniform rod of weight w = 73.5 N and length L = 2.55 m is supported by a cable at an…

A: Given Data : The weight of the rod is given as w = 73.5N. The length of the rod is given as L =…

Q: Two children of mass 15 kg and 35 kg sit balanced on a seesaw with the pivot point located at the…

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Q: Two children of mass 16 kg and 37 kg sit balanced on a seesaw with the pivot point located at the…

A: Let the distance of the smaller child from the pivot point be denoted as x. The corresponding…

Q: The 3m long uniform plank is supported by a fulcrum at the midpoint. Where a 45kg student should…

A: Mass of person1 : m1 = 30 kg Mass of person2 : m2 = 40 kg Mass of person3 : m3 = 45 kg  Position of…

Q: A sign is supported by a uniform horizontal boom of length  3.10 m and weight 72.0 N. A cable,…

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Q: The system in the figure is in equilibrium. A concrete block of mass 209 kg hangs from the end of…

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Q: Two children of mass 25 kg and 26 kg sit balanced on a seesaw with the pivot point located at the…

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Q: A 460-N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal,…

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Q: A 560-N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal,…

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Q: B 15. 25 KN 30

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A: Solution:

Q: A 60 kg uniform board 2.4 m long is supported by a pivot d=80 cm from the left end. How far from the…

A: mass of board = 60 kg Length of board = 2.4 m d = 80 cm = 0.8 m mass of child = 38 kg

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Q: A uniform rod of weight 5 N and length 1 m is pivoted at a point 20 cm from one of its ends. A…

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Q: Two children of mass 20.0 kg and 30.0 kg sit balanced on a seesaw with the pivot point located at…

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Q: A uniform plank of length 5.35 m and mass 26.9 kg rests horizontally across two horizontal bars of a…

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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.