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Chapter 2, Problem 24P
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### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

#### Solutions

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Section
BuyFindarrow_forward

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# The velocity vs. time graph for an object moving along a straight path is shown in Figure P2.21. (i) Find the average acceleration of the object during the time intervals (a) 0 to 5.0 s, (b) 5.0 s to 15 s. and (c) 0 to 20 s. (ii) Find the instantaneous acceleration at (a) 2.0 s, (b) 10 s, and (c) 18 s.Figure P2.24

(i)

(a)

To determine
The average acceleration of the object.

Explanation

Given info:

The initial velocity of the object is âˆ’8.0â€‰m/s .

The final velocity of the object is âˆ’8.0â€‰m/s .

The initial time of the interval is 0 .

The final time of the interval is 5.0â€‰s .

Formula to calculate average acceleration is,

aÂ¯=vfâˆ’vitfâˆ’ti

• aÂ¯ is the average acceleration of the object
• vf is the final velocity of the object
• vi is the initial velocity of the object
• ti final time of the interval
• tf final time of the interval

Substitute âˆ’8

(b)

To determine
The average acceleration of the object.

(c)

To determine
The average acceleration of the object.

(ii)

(a)

To determine
The instantaneous acceleration of the object at 2.0s .

(b)

To determine
The instantaneous acceleration of the object at 10s .

(c)

To determine
The instantaneous acceleration of the object at 18s .

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