MHT CET · Physics · Rotational Motion
A wheel initially at rest, begins to rotate about its axis with constant angular acceleration. If it rotates through an angle \(\theta_1\) in first 2 s and a further angle \(\theta_2\) in the next 2 s , the ratio \(\theta_1: \theta_2\) is
- A \(1: 6\)
- B \(6: 1\)
- C \(3: 1\)
- D \(1: 3\)
Answer & Solution
Correct Answer
(D) \(1: 3\)
Step-by-step Solution
Detailed explanation
\(\theta_1 = \frac{1}{2} \alpha t_1^2 = \frac{1}{2} \alpha (2)^2 = 2\alpha\) \(\theta_{total} = \frac{1}{2} \alpha (t_1+t_2)^2 = \frac{1}{2} \alpha (2+2)^2 = \frac{1}{2} \alpha (4)^2 = 8\alpha\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A bar magnet is held perpendicular to a uniform magnetic field. The couple acting
on the magnet is to be halved by rotating it. Through what angle it should be
rotated? \(\left[\sin \left(\frac{\pi}{2}\right)=1\right]\)MHT CET 2020 Medium - Which one of the following logic gates is called as Universal gate?MHT CET 2022 Easy
- On an imaginary linear scale of temperature (called ' \(\mathrm{W}\) ' scale) the freezing and boiling points of water are \(39^{\circ} \mathrm{W}\) and \(239^{\circ} \mathrm{W}\) respectively. The temperature on the new scale corresponding to \(39^{\circ} \mathrm{C}\) temperature on Celsius scale will beMHT CET 2021 Hard
- The radius of gyration of a circular disc of radius R and mass m rotating about diameter as axis isMHT CET 2024 Easy
- A pulse of a wave train travels along a stretched string and reaches the fixed end of the string. It will be reflected back withMHT CET 2007 Medium
- For a perfectly black body, the graph is plotted between the frequency of radiation with maximum intensity \(\left(v_{\mathrm{m}}\right)\) and the absolute temperature ' \(\mathrm{T}\) '. Out of the following which is the correct graph?
MHT CET 2022 Easy
More PYQs from MHT CET
- \(\int \sqrt{\frac{1+x}{1-x}} d x=\)
(where \(C\) is a constant of integration.)MHT CET 2022 Medium - The standard \(E_{\text {red }}^{\circ}\) values of \(A, B\) and \(C\) are \(+0.68 \mathrm{~V},-2.54 \mathrm{~V},-0.50 \mathrm{~V}\) respectively. The
order of their reducing power isMHT CET 2007 Easy - Which from following pairs of compounds exhibits metamerism?MHT CET 2024 Easy
- Let \(\bar{a}=\hat{i}+\hat{j}, \overline{\mathrm{~b}}=2 \hat{i}-\hat{\mathrm{k}}, \overline{\mathrm{c}}=3 \hat{i}-\hat{\mathrm{j}}+\hat{\mathrm{k}}\), then vector \(\overline{\mathrm{p}}\) satisfying \(\overline{\mathrm{p}} \cdot \bar{a}=0\) and \(\overline{\mathrm{p}} \times \overline{\mathrm{b}}=\overline{\mathrm{c}} \times \overline{\mathrm{b}}\) isMHT CET 2025 Medium
- A uniform wire \(20 \mathrm{~m}\) long and weighing \(50 \mathrm{~N}\) hangs vertically. The speed of the wave at mid point of the wire is (acceleration due to gravity \(=\mathrm{g}=10 \mathrm{~ms}^{-2}\) )MHT CET 2023 Medium
- What is the value of increase in internal energy when system does \(8 \mathrm{~J}\) of work on surrounding by supplying \(40 \mathrm{~J}\) of heat to it?MHT CET 2023 Medium