Log in
Physics
1
answer
2
watching
2,034
views

The figure shows the simple model of a seesaw. This consists of a plank/rod of mass m and length 2x allowed to pivot freely about its center as shown in the diagram. A small sphere of mass m1 is attache to the left end of the rod and mass m2 to the right end. The spheres can be considered as point particles. The gravitational force acts downwards. The magnitude of the acceleration due to gravity is equal to g. what is the moment of inertia i of this assembly about the axis through which it is pivoted?

Watch
1
answer
2
watching
2,034
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Hubert Koch
Hubert KochLv2
19 Mar 2020

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Two objects of masses m1 and m2 are attached to a seesaw. The seesaw is made of a bar that has length l and is pivoted so that it is free to rotate in the vertical plane without friction.Assume that the pivot is attached tot he center of the bar. In all cases, assume that m1>m2.

Assume that the mass of the swing bar, as shown in the figure, is negligible.

Find the magnitude of the angular acceleration α of the seesaw. 

Express your answer in terms of some or all of the quantities m1, m2, l, as well as the acceleration due to gravity g.

 

Two objects of masses m1 and m2 are attached to a seesaw. The seesaw is made of a bar that has length l and is pivoted so that it is free to rotate in the vertical plane without friction. Assume that the pivot is attached tot he center of the bar.

You are to find the angular acceleration of the seesaw when it is set in motion from the horizontal position. In all cases, assume that m1>m2.

 

Part A

Assume that the mass of the swing bar, as shown in the figure, is negligible. (Figure 1)

Find the magnitude of the angular acceleration α of the seesaw.

Express your answer in terms of some or all of the quantities m1, m2, l, as well as the acceleration due to gravity g.

Part B

In what direction will the seesaw rotate, and what will the sign of the angular acceleration be?

14.86 - The Silently Ringing Bell. A large, 34.0-kg bell is hung from a wooden beam so it can swing back and forth with negligible friction. The bell's center of mass is 0.60 m below the pivot. The bell's moment of inertia about an axis at the pivot is 18.0 kg.m'. The clapper is a small, 1.8-kg mass attached to one end of a slender rod of length L and negligible mass. The other end of the rod is attached to the inside of the bell; the rod can swing freely about the same axis as the bell. What should be the length L of the clapper rod for the bell to ring silently—that is, for the period of oscillation for the bell to equal that of the clapper?

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in