A 20 kg wooden plank is supported by a fulcrum at the midpoint. A 79 kg man is positioned 1.5 m from the fulcrum who balances a boy positioned 3.0 from it. What is the approximate mass of the boy O 20 kg O 40 kg O 50 kg O 30 kg

A 20 kg wooden plank is supported by a fulcrum at the midpoint. A 79 kg man is positioned 1.5 m from the fulcrum who balances a boy positioned 3.0 from it. What is the approximate mass of the boy O 20 kg O 40 kg O 50 kg O 30 kg

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 1STP

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

A 20 kg wooden plank is supported by a fulcrum at the midpoint. A 79 kg man is positioned 1.5 m from the fulcrum who balances a boy positioned 3.0 from it. What is the approximate mass of the boy?
O 20 kg
O 40 kg
O 50 kg
O 30 kg

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