Below a metal beam of length Bm rests on a pivot at 2m from the right end. To balance the weight of the metal beam, two metal posts have been attached. The metal post on the right has a mass of 200kg and is 50cm from the right end. The metal post on the left has a mass of 500kg and is 1.5m from the right end What is the mass of the metal beam? (Answer. 275kg)

Q: A meter stick (a uniform thin rod of length 1.0 m and mass 0.30 kg) is placed on a fulcrum at the 61…

A: Let l denotes the meterstick length, m denotes the meterstick mass, r denotes the pivot distance, x…

Q: 17. A system of weight 7 Kg is heated from its initial temperature of 10ºC to its final temperature…

A: The heat obtained by a system of mass m and having a specific heat CV to raise the temperature by ∆T…

Q: Big Sister and Little Brother are balanced on a see-saw.  Big Sister sits a distance of 1.13m away…

A: Approach to solving the question:Please see attached photos for detailed solutions. Thank you.…

Q: 16. A 20kg block of Aluminum (p=2700kg/m» is about to be pulled out from the bottom of the sea. What…

A: 16. Given that, The mass of the Aluminium block, m = 20 kg The density of Aluminium is 2700 kg/m3 We…

Q: A bar weighs 8 N and is 5 m in length. What is the weight needed (M) to balance the bar? Don't…

A:

Q: A wooden plank of length 240 cm lies on the edge of a crate with 80 cm hanging over the crates edge.…

A:

Q: e bones of the forearm about 2.15 cm beyond the joint. Assume the forearm has a mass of 2.45 kg and…

A: Given values:- Biceps muscle connects to the bones of the forearm,(r0)=2.15 cm=0.0215 m -----(1)…

Q: A 70 kg person stands on the very end of a uniform board of length l, which is supported one-quarter…

A: Given values:Mass of the person, M = 70 kgLength of the rod = LLet the mass of the board be m

Q: Abeam with a length of 3.50 m and a weight of 200 N is attached on one end to a vertical wall with a…

A: Given, Weight of beam, W=200N Length of a beam, L=3.5m Weight of the box, w=50N   Let the reactions…

Q: The meterstick weighs 10N. If a rock hangs on one end and the whole system is balanced at the 20 cm…

A:

Q: A 198 kg, 5 m long beam sits on top of two posts.  A 3 kg pail sits 0.7 m from the left edge of the…

A: SOlution:

Q: A plank of length l = 2.45 m is to be balanced on a see-saw. On one side of the plank hangs a mass…

A:

Q: A 40kg dog and a 30kg cat are sitting on either end of a long board balanced precariously on a pivot…

A:

Q: Three children are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a…

A: When placed on the ends of a seesaw, children perform up and down motions in an arc, which is a part…

Q: Two children are balanced on a seesaw that has a mass of 13.0 kg. The first child has a mass of 26.0…

A: Mass of seesaw (M) = 13 kg Mass of first child (m) = 26 kg Distance of first child from pivot (d) =…

Q: A shelf with a mass 11kg and length 2.0 m is attached to the pivot, at which the shelf can rotate. W…

A:

Q: A wooden plank (3 m long) is supported at each end by two support beams. The plank has a mass of 55…

A:

Q: Sam and Joe are carrying a 400 N uniform beam when Cheetah (Tarzan's pet chimp having a mass of 33.0…

A:

Q: A heavy block of a mass of M = 71 kg is attached to the left end of a horizontal beam (beam's mass m…

A:

Q: 8.00 m long beam with a mass of 8.70 kg is suspended horizontally from a post, as shown. The left…

A:

Q: A board has its mass of 30.0 kg uniformly distributed along its' length of 4.00 m. The board sits on…

A:

Q: A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 57.5-gram…

A: The expression for find mass of meter stick is m'=l'cm-llcm-l'cmm Here, m is mass of meter stick,…

Q: Consider a see-saw of total length 5.40m balanced at its center of mass, with a child of mass…

A: Draw the free-body diagram of the system.

Q: A board has its mass of 30.0 kg uniformly distributed along its' length of 4.00 m. The board sits on…

A: Given data- A board has its mass of M=30.0 kg uniformly distributed along its' length of L=4.00 m.…

Q: d. A box of mass 23kg sits on the bar at a distance of 3.8m from the left end. TI oported by a cable…

A: Given:- The length of the bar is L = 7.5 m  The mass of the bar is M = 24 kg  The mass of the box is…

Q: A very light rod 40cm long is privoted at the center.A weigh of 50N is placed at one end. Where…

A: Let , x be the distance for the centre of rod where the weight 500 N is placed. Now, for the rod to…

Q: Two people are sitting on either side of a seesaw. One has mass m and is sitting x meters from the…

A:

Q: A sign for a pizza restaurant hangs from a 2.60-m long rod extended out from a building. A cable,…

A:

Q: Two window washers, Bob and Joe, are on a 3.00-m-long, 315-N scaffold supported by two cables…

A:

Q: At what position (measured from the 0 cm end of the meter stick) should a 0.22 kg mass be hung to…

A: Answer is 61 cm from 0 cm mark . Explanation   with answer is in next step.

Q: block of mass M = 6.1 kg rests

A: The questions are answered below

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

A:

Q: A horizontal beam of length 2 m and mass 8.0 kg has a mass of 5.0 kg and width 0.8 m sitting at the…

A: The data given in the system is, A. Beam a. Mass, mb=8 kg b. Length, l=2 m B. Block a. Mass of the…

Q: baseball bat balances 71.9 cm from one end. If an 0.587-kg glove is attached to that end, the…

A: Given parameter                         The baseball bat balances(r) = 71.9cm…

Q: A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 58.0-gram…

A: ? - mass of the meter stick, ? = 58 gramLengths ?1 and ?2 can be found as:?1 = 39.2 − 22.5 =16.7…

Q: A see-saw consists of a uniform board with mass 43.6kg and length l = 2.01m. It supports two friends…

A: For the see-saw to balance, the torques due to the forces acting on either sides should balance each…

Q: The two children sit at opposite ends of a seesaw of negligible mass. The seesaw has a length of 4.0…

A: Consider the adult of mass 60 kg sits on the left side from the pivot point because on the left side…

Q: A woman of mass 58kg sits on the left end of a see-saw of length 4m, pivoted in the middle. A man of…

A: mass of woman (m)= 58 kg mass of man (m') = 85 kg length of see saw (L) = 4 m mass of plank (M) = 12…

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

A:

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

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

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.