A body starts from rest and acquires the velocity of 70 km/hr in 5 minutes. calculate the work done,if the mass of the body is 500kg
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Answer:Given, m(mass)=500 kg.
t(time)= 5min= 30 sec.
v(velocity)= 70km/hr= 70×(1000÷3600)= 19.44 m/s.
So, the W(work)= mv/t= 500(19.44/300)= 32.4 N.
Explanation: We know that, Work is equals to invested energy, and we invest energy by applying Force on something. F= ma, here, the a=v/t. And the Force is applied for Work to be done. So, W= mv/t.
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