0 N. It's being pushed up the same amount it's being pushed down, so it cancels out.
By Newton's second law, we have

So, in order to give a 0.15kg body an acceleration of 40m/s^2, you need a force of

it's caused by a pressure that is large on the button of an object that it is on the top of an object submerged in a liquid.
Explanation:
This is why object appear to weigh less when immersed in a liquid. If the upthrust is greater than the weight of the object, the object will rise up through the liquid.
Well one is from potential energy to ascensive moving energy . And another is from electrical to circuit energy.
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