Question

if a bus of 2000 kg is moving with a velocity of 72 km/h ,then calculate its kinetic energy

Answer 1

Kinetic Energy=1/2×mass×(velocity)²

As weight is given mass=Weight/Gravitational Force

Weight is given as 2000kg and Gravitational Force=9.8m/s²

So we will find mass first=2000/9.8=204.0 something by round off=204kg/ms²

So now we are going to find the Kinetic Energy..

=1/2×204×(72)²

=102×5184

=528768 joules

That is the answer you can mark it as brainliest

Answer 2

given,

mass, m=2000kg

velocity, v=72km/h

K.E=?

we know,

K.E=1/2×mv square

=1/2×2000×20×20

=1/2×2000×400

=1000×400

=400000 joules.




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