It can have more than one answer 25. A person stands on a scale in an elevator.

Question

It can have more than one answer
25. A person stands on a scale in an elevator. When will the scale reads his weight? a. elevator is accelerating downward c. clevator is accelerating upward b. elevator is moving at a constant velocity d elevator is at rest 26. Mr. Catala is showing the class a conical pendulum made with a mass and a light string. The pendulum follows a circular path at a constant speed v and radius R. Use the direction labels on the rosette to answer the questions. Which of the following statements are true? Top View 2053

Explanation / Answer

The scale will read the TRUE weight of the person when elevator is at rest and when moving with constant velocity

correct options : (b) , (d)

Here FN is normal force , m is the mass of person , a is acceleration of elevator , g is acc due to gravity.

In case (a): FN =mg - ma, which is LESS than the true weight.

In case (b): FN = mg if the elevator is at rest or moving at constant velocity.(because acceleration in case of constant velocity is zero).

In case (c): FN =mg+ma, which is GREATER than the true weight.

In case (d):  FN = +mg

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.