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Chemical EngineeringFundamentals of Chemical Engineering Thermodynamics (MindTap Course List)A box has a mass of 20 kg, and a building has a height of 15 meters. A. Find the force of gravity acting on the box. B. Find the work required to lift the box from the ground to the roof of the building. C. Find the potential energy of the box when it is on the roof of the building. D. If the box is dropped off the roof of the building, find the kinetic energy and velocity of the box when it hits the ground.BuyFind*arrow_forward*

1st Edition

Kevin D. Dahm + 1 other

Publisher: Cengage Learning

ISBN: 9781111580704

Chapter 1.7, Problem 20P

Textbook Problem

A box has a mass of 20 kg, and a building has a height of 15 meters.

**A.** Find the force of gravity acting on the box.

**B.** Find the work required to lift the box from the ground to the roof of the building.

**C.** Find the potential energy of the box when it is on the roof of the building.

**D.** If the box is dropped off the roof of the building, find the kinetic energy and velocity of the box when it hits the ground.

Expert Solution

A)

Interpretation Introduction

**Interpretation:**

The force of gravity acting on the box has to be determined.

**Concept introduction:**

The force of gravity acting on the box:

Here, mass is *M* and acceleration is *a*.

Calculate the force of gravity acting on the box.

Substitute 20 kg for *M* and *a*.

Expert Solution

B)

Interpretation Introduction

**Interpretation:**

The work required to lift the box from the ground to roof of the building.

**Concept introduction:**

The work required to lift the box.

Here, force is *F* and distance is *d*.

Expert Solution

C)

Interpretation Introduction

**Interpretation:**

The potential energy of the box when it is on the roof of the building.

**Concept introduction:**

The potential energy of the box

Here, gravity is *g* and height of building is *h*.

Expert Solution

D)

Interpretation Introduction

**Interpretation:**

The velocity and kinetic energy of box when it hits the road.

**Concept introduction:**

The kinetic energy of the box when its hits the road.

Here, velocity is *v*.

Fundamentals of Chemical Engineering Thermodynamics (MindTap Course List)

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