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The velocity of truck is changing …

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The velocity of truck is changing from 6 km/hr to 90 km/hr in 30 minutes if mass of the truck is 1000kg . Then what will be the work done doing time ?

Posted by Aryan Chauhan 6 years, 9 months ago

CBSE > Class 09 > Science

1 answers

बेबि बीच 6 years, 9 months ago

Initial velocity (u) = 6km/h = (5/3)m/s Final velocity (v)= 90km/h = 25m/s Time taken (t)= 30min = 1800s Acceleration (a) using defination of acceration =( v-u)/t ={25-(5/3)}/ 1800 = {(75-5)/3}/ 1800 = 7/540 m/s^2 The distance travelled S= ut + (1/2)at^2 =24000m Work done = Force × displacement= mass × acceleration × displacement= 1000×(7/340)×(24000) =311111.11 J

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