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Question

We have an electric kettle rated at (60v, 5A). We have a mass of 10 kg that is placed such that the steam in the kettle is used to drive the mass in the horizontal direction.If the kettle runs for 5 minutes.What is the velocity of mass attained?



Your Answer
A

100 m/s

Your Answer
B

50 m/s

Your Answer
C

60√20  m/s

Correct Answer
D

30√20  m/s


Solution

The correct option is D

30√20  m/s


The energy used by kettle is = VIt = 60 × 5 × 5 × 60 = 90000 Ws = 90000 J
Now,This energy is used to drive the ball.

90000 = 12× m × v2

v2​​ = 90000×210

v = 18000

v = 3020 ms

v = 605 ms

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