A 900-kg car maintains a speed of 130 km/h on a horizontal roadway when its engine delivers a maximum power of 40.0 hp. How large is the friction force that impedes its motion at this speed? A) 761 N B) 921 N C) 669 N D) 826 N

A 900-kg car maintains a speed of 130 km/h on a horizontal roadway when its engine delivers a maximum power of 40.0 hp. How large is the friction force that impedes its motion at this speed? A) 761 N B) 921 N C) 669 N D) 826 N

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

Question

12. A 900-kg car maintains a speed of 130 km/h on a horizontal roadway when its engine delivers a
maximum power of 40.0 hp. How large is the friction force that impedes its motion at this speed?
A) 761 N
B) 921 N
C) 669 N
D) 826 N

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