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Chapter 2: Q. 6 (page 58)

FIGURE Q2.6 shows the position-versus-time graph for a moving

object. At which lettered point or points:

a. Is the object moving the slowest?

b. Is the object moving the fastest?

c. Is the object at rest?

d. Is the object moving to the left?

Short Answer

Expert verified

a. The object is moving the slowest at the point B.

b. The object is moving the fastest at the point D.

c. The object is at rest at the points A, C and E.

d. The object is moving to the left from point D.

Step by step solution

01

Part a; Step 1: Introduction

We know that the slope of the position-time graph shows the average speed. The higher is the slope, the greater is the speed.

02

Explanation

At point A, C and E the object is at rest. Compare at the points B and D, the graph is steeper at D than B.

So the object is moving the slowest at B.

03

Part b; Step 1: Introduction

We know that the higher slope of position-time graph shows the higher speed.

04

Explanation

The graph is steeper at point D. So the object is moving the fastest at D.

05

Part c; Step 1: Introduction

At the points A, C and E, there is no slope in the position-time graph as shown in the diagram.

06

Explanation

As there is no slope of the graph at point A, C and E, there the object is at a rest.

07

Part d; Step 1: Introduction

The object has a negative slope at point D

08

Explanation

The object having negative slope at D moves in opposite direction or moving from right to left as shown in the graph.

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