How much energy dose it take to move 90 kg 8 meters per second?

Answer 1

An object that has 90 kg of mass and is moving at 8 meters per second

already has 2,880 joules of kinetic energy. In order to get the mass moving

at that speed, those joules had to come from somewhere. But now that it's

already moving, it doesn't need any more energy to keep going in a straight

line at the same speed. You only have to come up with some more energy

if you want to speed it up, or turn it in a different direction. And if you want to

slow it down, the object gives you energy, which you can take home with you

and use for other activities.