Q.20

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Found in: Page 155

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# FIGURE EX shows the velocity graph of a kg passenger in an elevator. What is the passenger’s weighta. At s? b. At s? c. At s?

a. The passenger weight at is

b. The passenger weight at is

c. The passenger weight at is

See the step by step solution

## Step 1: Content Introduction

Weight of an object is the gravitational force exerted on it and it is the product of the mass of the object m and the gravitational acceleration g.

The equation for the apparent weight of the passenger is

Here, a is acceleration of the passenger.

The expression which relates acceleration, velocity and time is

## Step 2: Explanation (Part a)

The acceleration of passengers between time is

Substitute,

## Step 3: Explanation (part b)

The acceleration of passenger at is zero.

The equation for apparent weight of the passenger at time is

## Step 4: Explanation (Part c)

The acceleration of passenger at is

The equation for apparent weight of the passenger at time