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College Physics

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

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Chapter
Section
BuyFindarrow_forward

College Physics

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

A motorist drives for 35.0 minutes at 85.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130. Km in 2.00 h. (a) What is his total displacement? (b) What is his average velocity?

(a)

To determine
The total displacement of the motorist.

Explanation

Given info: The speed of the motorist is 8.50km/h , the time elapsed in the first interval is 35.0min , and the displacement of the motorist in the second interval

Explanation:

The formula to calculate the displacement of the motorist in the first interval is,

Δx1=v1Δt1

Here,

Δx1 is the displacement in the first interval

v1 is the velocity of the motorist in the first interval

Δt1 is the time elapsed in first interval

Substitute 8.50km/h for v1 and 35.0min for Δt1 to find Δx1 .

Δx1=(8.50km/h)((35.0min)(1h60.0min))=50

(b)

To determine
The average velocity of the motorist.

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