Question

How much energy (in Joules) is consumed to bring 1 kg of fruits/vegetables from local market/farm (within the distance of 5 Km) over a bicycle? Consider speed of the bicycle is 10 m/s and air resistance is the main opposing force.
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Answer 1

Answer:

☆ By work energy theorem: -

Work done by all = change in kinetic energy

W = $\bold{{KE}_{f}}$ - $\bold{{KE}_{i}}$

•W = $\frac {1}{2}$m $\bold{{v}^{2}}$

•W = $\frac {1}{2}$ × 1 × 10 ×10

•W = 50 juoles

Note: force produced by the bicycle is equal to the air resistance, for that very reason it has 0 acceleration and moving with constant velocity.

hope it helps!