Question

12. A vehicle expends an energy of 40000 J while
moving at a constant speed of 10 ms-1. What is
the mass of vehicle?
[800 kg]​

Answer 1

Answer:

80 kg

Step-by-step explanation:

As we know during translation only energy is kinetic energy (neglecting heat losses)

Hence K.E=4000 J

=> 0.5*M*V*V=4000 J

=> 0.5*M*10*10=4000 J

=>0.5*100*M=4000 J

=>50*M=4000 J

=>M=4000/50

=>M=80 kg

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