If a that has a power of 0.3 KW is used to make a fruit smoothie, which takes 50 seconds, the energy used is 15 KJ
P = W / t
P = Power
W = Work done
t = Time
P = 0.3 KW
t = 50 s
W = P * t
W = 0.3 * 50
W = 15 KJ
Work done is the change in energy. Whenever there is a change in energy in a system, work is said to be done in the system. So,
Work done, W = Change in energy, ΔE
ΔE = 15 KJ
Therefore, the 15 KJ of energy is used.
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