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PHY 101 Rotational Motion Objective Question
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Question

In a problem involving a uniform ladder resting against a smooth wall, the force from the wall on the ladder is
Options
A horizontal only, because the wall is smooth.
Correct Answer
B vertical only, because the wall is smooth.
C both horizontal and vertical.
D zero.
Correct Answer

Option A is the correct answer.

Detailed Explanation

A 'smooth' wall is defined as one with no friction. Therefore, it cannot exert any vertical (frictional) force on the ladder. The only force it can exert is a normal force, which is perpendicular to the surface. Since the wall is vertical, this normal force is horizontal.

Hint

Consider what 'smooth' implies for the types of forces a surface can exert. It can only push perpendicularly, not parallel.

Question Info

Course: PHY 101
Topic: Rotational Motion
Type: Objective
Difficulty: Not specified
Question 765 of 1250
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