Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

A uniform meter rule weighs 1 kg and is pivoted at the 60 cm mark. A 40 g weight is suspended from the 100 cm mark. At which mark should a 30 g mass be placed to keep the ruler in equilibrium?
Options
A 20 cm
Correct Answer
B 30 cm
C 40 cm
D 50 cm
Correct Answer

Option A is the correct answer.

Detailed Explanation

The 30 g mass should be placed at the 20 cm mark.

Hint

Use the principle of moments: sum of clockwise moments = sum of anticlockwise moments about the pivot.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 191 of 1250
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