- #1

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I have a problem with calculating energy which I should have learnt long ago in my high school time.

If I push (accelerate) a 1 kg object 1 meter/sec

^{2}for 10 seconds, I spend energy like this.

Distance = 1/2 at

^{2}. So I would have pushed this object for 50 metres. So I'm using energy 50 metres * 1 kg * 1 m/sec

^{2}= 50 joules.

Am I right?

Now for the second question. Supposed I push a wall with the same force as above for 10 seconds, how can I calculate the energy consumption? Considering the wall doesn't move.

Thank you very much.