Answer:
2100 J
Explanation:
Parameters given:
Force acting on the object, F = 420 N
Distance moved by object, d = 5m
The change in kinetic energy of an object is equal to the work done by a force acting on the object:
W = F * d
∆KE = F * d
∆KE = 420 * 5
∆KE = 2100 J
DEFINITION:::::;;The type of reactions in which energy is releases to the environment are called Exothermic reactions.
EXAMPLE::: formation of carbon dioxide and urea formation are actually the examples of exothermic reaction..
Hope it helps

With the given values of
, we have

Try dealing with the powers of 10 first: On the right, we have

Meanwhile, the other values on the right reduce to

Then taking units into account, we end up with the equation

Now we solve for
:


or, if taking significant digits into account,

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