Medium MCQ +4 / -1 PYQ · JEE Mains 2023

Given below are two statements :

Statement I : An elevator can go up or down with uniform speed when its weight is balanced with the tension of its cable.

Statement II : Force exerted by the floor of an elevator on the foot of a person standing on it is more than his/her weight when the elevator goes down with increasing speed.

In the light of the above statements, choose the correct answer from the options given below :

  1. A Both Statement I and Statement II are false
  2. B Both Statement I and Statement II are true
  3. C Statement I is false but Statement II is true
  4. D Statement I is true but Statement II is false Correct answer

Solution

<p><b>Statement I</b> says that when the weight of an elevator is balanced with the tension of its cable, it can move up or down with a uniform speed. This is true because the weight of the elevator is balanced by the tension in the cable, which allows it to move smoothly and at a constant speed.</p> <p><b>Statement II</b> says that the force exerted by the floor of an elevator on a person's foot is greater than their weight when the elevator goes down with increasing speed. This is false because the force exerted by the floor on a person's foot is equal to their weight, regardless of the speed of the elevator. The person's weight is a constant force and does not change with the speed of the elevator. The apparent weight of a person may change with the speed of the elevator, but this is due to the effects of acceleration and not an increase in the force exerted by the floor.</p>

About this question

Subject: Physics · Chapter: Laws of Motion · Topic: Newton's First Law

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