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Chapter 1: Q. 10 (page 29)

FIGURE EX1.10 shows two dots of a motion diagram and vector v1鈫�. Copy this figure, then add dot 3 and the next velocity vector v2鈫�if the acceleration vector a鈫�at dot 2

(a) points up and (b) points down.

Short Answer

Expert verified

The vector diagrams are shown.

Step by step solution

01

Step1. write the given information

Points 1 and 2 are the position of the object with respect to time. The vector sign shows the direction of the velocity of the object

02

Step 2. i) To draw a point above point 2 such that acceleration is upwards

The acceleration of the body is a change in velocity with respect to time. The next dot should be added above point 2 such that the distance between points 1 and 2 is less than the distance between points 2 and 3.

The acceleration at point 2 is upwards.

03

Step 3. ii) To draw a point above point 2 such that acceleration is downwards

The acceleration at point 2 would be downwards when the velocity of the object between points 2 and 3 is less than the velocity between points 1 and 2 as shown in the figure.

The average acceleration at point 2 is downwards.

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