only Q4 4. A 1000 kg automobile accelerates from 10 km/hr to 120 km/hr. How much work doesthisrequire?(a) 0 kJ(b) 501 kJ(c) 552 kJ (d) 780 kJ5. A 175 W vacuum cleaner is powered by an electric motor whose efficiency is 65%. (Notethat the electric motor delivers 175 W of net mechanical power to the fan of the cleaner).The rate at which this vacuum cleaner supplies energy to the room when running is:(a) 140 W(b) 300 W(c) 269 W(d) 360 W

Question(4)Given:Mass Initial Velocity Final Velocity To find:The required Work

Answered: A 1000 kg automobile accelerates from…

Engineering

Mechanical Engineering

A 1000 kg automobile accelerates from 10 km/hr to 120 km/hr. How much work does this require?

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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Question

only Q4

4. A 1000 kg automobile accelerates from 10 km/hr to 120 km/hr. How much work does
this
require?
(a) 0 kJ
(b) 501 kJ
(c) 552 kJ (d) 780 kJ
5. A 175 W vacuum cleaner is powered by an electric motor whose efficiency is 65%. (Note
that the electric motor delivers 175 W of net mechanical power to the fan of the cleaner).
The rate at which this vacuum cleaner supplies energy to the room when running is:
(a) 140 W
(b) 300 W
(c) 269 W
(d) 360 W

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