A stone is tied to a string of length \( \ell \) and is whirled in a vertical circle with the ...

Channel:
PW Solutions
Subscribers:
445,000
Published on ● Video Link: https://www.youtube.com/watch?v=Ce8uON6vn0Y


Duration: 6:38
1 views
0

A stone is tied to a string of length \( \ell \) and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time, the stone is at its lowest position and has a speed \( \mathrm{u} \) . The magnitude of the change in velocity as it reaches a position where the string is horizontal ( \( \mathrm{g} \) being acceleration due to gravity) is :-
(1) \( \sqrt{u^{2}-g \ell} \)
(2) \( u-\sqrt{u^{2}-2 g \ell} \)
(3) \( \sqrt{2 g \ell} \)
(4) \( \sqrt{2\left(u^{2}-g \ell\right)} \)
\( \mathrm{P} \)
W
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2023-01-15Four particles each of mass \( \mathrm{m} \) are placed at the corners of a square of side lengt...
2023-01-15Three thin uniform rods each of mass \( M \) and length \( \mathrm{L} \) are placed along the th...
2023-01-15The curve for the moment of inertia of a sphere of constant mass \( \mathrm{M} \) versus distanc...
2023-01-15If \( \mathrm{I}_{1}, \mathrm{I}_{2} \) and \( \mathrm{I}_{3} \) are moments of inertia of solid...
2023-01-15Which of the following has the highest moment of inertia when each of them has the same mass and...
2023-01-15Four point masses (each of mass \( \mathrm{m} \) ) are arranged it the X-Y plane the moment of i...
2023-01-15The M.I. of a thin rod of length \( \ell \) about the perpendicular axis through its centre is I...
2023-01-15Three identical particles are joined together by a thread as shown in figure. All the three part...
2023-01-15The moment of inertia of a square lamina about the perpendicular axis through its centre of mass...
2023-01-15On account of the earth rotating about its axis :- (1) the linear velocity of objects at equator...
2023-01-15A stone is tied to a string of length \( \ell \) and is whirled in a vertical circle with the ...
2023-01-15A solid sphere and a hollow sphere of the same mass have the same M.I. about their respective di...
2023-01-15A wheel has a constant angular acceleration of \( 3.0 \mathrm{rad} / \mathrm{s}^{2} \), During a...
2023-01-15A mass \( m \) is attached to the end of a rod of length \( \ell \). The mass goes around a vert...
2023-01-15All the particles of a rigid rotating body move in a circular path when the axis of rotation:- (...
2023-01-15Point out the correct example of cruciferae :- (1) Mustard (2) Pea V (3) Onion
2023-01-15Which is not a stem modification - \( \mathrm{P} \) (1) Rhizome of ginger (2) Corm of Colocasia ...
2023-01-15Zygomorphic flowers are found in:- (1) Solanaceae (2) Malvaceae P (3) Fabaceae
2023-01-15If the filaments are fused in a single group the condition is \( \mathrm{P} \) (1) Monoadelphous...
2023-01-15Polyadelphous stamens are found in :- (1) Cotton (2) China rose \( \mathrm{P} \) (3) Pea
2023-01-15Which is a modification of root that does not store P food? W. (1) Napiform root (2) Fusiform r...