Problem 3:An 8 m long uniform seesaw of 20 kg mass is supported at P by a 50 kg student at one end, an 80 kgstudent at the other end, and a child of unknown mass, m, one meter away from the support, asshown below.80 kg50 kgP<->1 m2 ma. If the system is in equilibrium, determine the mass of the child.Answer 3a:b. The child jumps off the seesaw and the students remain in the positions shown above. Whatis the linear acceleration of the 80 kg student? За: 30 kg3b: 0.43 m/s? ↑

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An 8 m long uniform seesaw of 20 kg mass is supported at P by a 50 kg student at one end, an 80 kg student at the other end, and a child of unknown mass, m, one meter away from the support, as shown below.

An 8 m long uniform seesaw of 20 kg mass is supported at P by a 50 kg student at one end, an 80 kg student at the other end, and a child of unknown mass, m, one meter away from the support, as shown below.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 36P: A crane of mass m1 = 3 000 kg supports a load of mass m2 = 10 000 kg as shown in Figure P10.36. The...

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Concept explainers

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.

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Problem 3:
An 8 m long uniform seesaw of 20 kg mass is supported at P by a 50 kg student at one end, an 80 kg
student at the other end, and a child of unknown mass, m, one meter away from the support, as
shown below.
80 kg
50 kg
P
<->
1 m
2 m
a. If the system is in equilibrium, determine the mass of the child.
Answer 3a:
b. The child jumps off the seesaw and the students remain in the positions shown above. What
is the linear acceleration of the 80 kg student?

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