SATHEE: Work Energy And Power Question 256

Work Energy And Power Question 256

Question: A body of mass m is accelerated uniformly from rest to a speed v in a time T. The instantaneous power delivered to the body as a function of time is given by

Options:

A) $\frac{m v^{2}}{T^{2}} . t^{2}$

B) $\frac{m v^{2}}{T^{2}} . t$

C) $\frac{1}{2} \frac{m v^{2}}{T^{2}} . t^{2}$

D) $\frac{1}{2} \frac{m v^{2}}{T^{2}} . t$

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $u = 0; v = u + a T; v = a T$

Instantaneous power $= F \times v = m . a .$

$a t = m . a^{2} . t$

$∴$ Instantaneous power $= m \frac{v^{2}}{T^{2}} t$

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Work Energy And Power Question 256

Question: A body of mass m is accelerated uniformly from rest to a speed v in a time T. The instantaneous power delivered to the body as a function of time is given by

Options:

Answer:

Solution:

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