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Category > Engineering Posted 09 Jun 2017 My Price 4.00

The speed of an electric motor is increased uniformly from 1200 to 1350 rpm in a time

The speed of an electric motor is increased uniformly from 1200 to 1350 rpm in a time of 1.5 s. Find (a) the angular acceleration, (b) the number of revolutions turned during this time.

A winding drum is accelerated from 480 to 840 rpm in a time of 2 s. Acceleration continues at the same rate for a further 4 s after which the drum continues rotating at a steady speed. Calculate the time taken to complete the fi rst 200 revolutions.

 

 
 

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Alpha Geek
(8)
Status NEW Posted 09 Jun 2017 07:06 AM My Price 4.00

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file 1496993321-1385357_1_636324889912193139_The-angular-acceleration-and-time.docx preview (147 words )
1-----------) T-----------he -----------spe-----------ed -----------of -----------an -----------ele-----------ctr-----------ic -----------mot-----------or -----------is -----------inc-----------rea-----------sed----------- un-----------ifo-----------rml-----------y f-----------rom----------- 12-----------00 -----------to -----------135-----------0 r-----------pm -----------in -----------a t-----------ime----------- of----------- 1.-----------5 s-----------. F-----------ind----------- (a-----------) t-----------he -----------ang-----------ula-----------r a-----------cce-----------ler-----------ati-----------on,----------- (b-----------) t-----------he -----------num-----------ber----------- of----------- re-----------vol-----------uti-----------ons----------- tu-----------rne-----------d d-----------uri-----------ng -----------thi-----------s t-----------ime-----------. -----------2) -----------A w-----------ind-----------ing----------- dr-----------um -----------is -----------acc-----------ele-----------rat-----------ed -----------fro-----------m 4-----------80 -----------to -----------840----------- rp-----------m i-----------n a----------- ti-----------me -----------of -----------2 s-----------. A-----------cce-----------ler-----------ati-----------on -----------con-----------tin-----------ues----------- at----------- th-----------e s-----------ame----------- ra-----------te -----------for----------- a -----------fur-----------the-----------r 4----------- s -----------aft-----------er -----------whi-----------ch -----------the----------- dr-----------um -----------con-----------tin-----------ues----------- ro-----------tat-----------ing----------- at----------- a -----------ste-----------ady----------- sp-----------eed-----------. C-----------alc-----------ula-----------te -----------the----------- ti-----------me -----------tak-----------en -----------to -----------com-----------ple-----------te -----------the----------- fi----------- rs-----------t 2-----------00
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