A body rotates about a fixed axis with an angular acceleration of 1 rad/sec2. Through what does it rotate during the time in which its angular velocity increases from 5 rad/s to 15 rad/s?

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Ques: A body rotates about a fixed axis with an angular acceleration of 1 rad/sec2. Through what does it rotate during the time in which its angular velocity increases from 5 rad/s to 15 rad/s?

Solution: In the given question, some known values are given as mentioned below:

Initial angular velocity of the fan, ω_i = 5 rad/s (Given)
Final angular velocity of the fan, ω_f = 15 rad/s (Given)
Angular acceleration, α = 1 rad/sec²(Given)

Here we will apply the equation of rotational motion for constant angular acceleration which is given as:

ω_f² = ω_i² + 2αθ

⇒ θ = \(\frac{\omega_f^2 - \omega_i^2}{2 \alpha}\)

Where

ω_f = final angular velocity
ω_i = initial angular velocity
α = angular acceleration
θ = angular displacement of the body during the time in which its angular velocity

Using the equation of rotational motion, angular displacement of the fan, is given by

θ = \(\frac{15^2-5^2}{2 \times 1}\) = \(\frac{225-25}{2}\) = 100 rad

Hence, the body rotates with an angular displacement of 100 rad during the time in which its angular velocity increases from 5 rad/s to 15 rad/s.

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A body rotates about a fixed axis with an angular acceleration of 1 rad/sec2. Through what does it rotate during the time in which its angular velocity increases from 5 rad/s to 15 rad/s?

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2.
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3.
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5.
Assertion : Photoelectric effect is a spontaneous phenomenon. Reason (R): According to the wave picture of radiation, an electron would take hours/days to absorb sufficient energy to overcome the work function and come out from a metal surface.

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dOGVmW

A body rotates about a fixed axis with an angular acceleration of 1 rad/sec2. Through what does it rotate during the time in which its angular velocity increases from 5 rad/s to 15 rad/s?

CBSE CLASS XII Related Questions

1.The figure represents the variation of the electric potential \( V \) at a point in a region of space as a function of its position along the x-axis. A charged particle will experience the maximum force at:

2.In a Young's double-slit experiment, two waves each of intensity I superpose each other and produce an interference pattern. Prove that the resultant intensities at maxima and minima are 4I and zero respectively.

3.The electric potential (V ) and electric field (⃗ E) are closely related concepts in electrostatics. The electric field is a vector quantity that represents the

5.Assertion : Photoelectric effect is a spontaneous phenomenon. Reason (R): According to the wave picture of radiation, an electron would take hours/days to absorb sufficient energy to overcome the work function and come out from a metal surface.

6.The energy of an electron in an orbit in hydrogen atom is \( -3.4 \, \text{eV} \). Its angular momentum in the orbit will be:

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Comments

dOGVmW

1.
The figure represents the variation of the electric potential \( V \) at a point in a region of space as a function of its position along the x-axis. A charged particle will experience the maximum force at:

2.
In a Young's double-slit experiment, two waves each of intensity I superpose each other and produce an interference pattern. Prove that the resultant intensities at maxima and minima are 4I and zero respectively.

3.
The electric potential (V ) and electric field (⃗ E) are closely related concepts in electrostatics. The electric field is a vector quantity that represents the

5.
Assertion : Photoelectric effect is a spontaneous phenomenon. Reason (R): According to the wave picture of radiation, an electron would take hours/days to absorb sufficient energy to overcome the work function and come out from a metal surface.

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