New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Work Power and Energy question

2024 · 29 Jan · Shift 2 · Q66

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Physics
Work Power and Energy
2024 · 29 Jan · Shift 2 · Q66

Work Power and Energy question

2024 · 29 Jan · Shift 2 · Q66

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1

A bob of mass '

m

' is suspended by a light string of length '

L

'. It is imparted a minimum horizontal velocity at the lowest point

A

such that it just completes half circle reaching the top most position B. The ratio of kinetic energies

\frac{(K . E)_A}{(K . E)_B}

is :

JEE Main 2024 (Online) 29th January Evening Shift Physics - Work Power & Energy Question 27 English

A
5 : 1
B
3 : 2
C
1 : 5
D
2 : 5

More from Work Power and Energy

A particle is placed at the point $A$ of a frictionless track $A B C$ as shown in figure. It is gently pushed towards right. The speed of the particle when it reaches the point B is : (Take $g = 10 m / s^{2}$ ). Includes diagram2024 · MCQ
A block of mass $1 kg$ is pushed up a surface inclined to horizontal at an angle of $6 0^{\circ}$ by a force of $10 N$ parallel to the inclined surface as shown in figure. When the block is pushed up by $10 m$ … Includes diagram2024 · MCQ
A body of mass $2 kg$ begins to move under the action of a time dependent force given by $F = (6 t \hat{i} + 6 t^{2} \hat{j}) N$ . The power developed by the force at the time $t$ is given by:2024 · MCQ
A small particle moves to position $5 \hat{i} - 2 \hat{j} + \hat{k}$ from its initial position $2 \hat{i} + 3 \hat{j} - 4 \hat{k}$ under the action of force $5 \hat{i} + 2 \hat{j} + 7 \hat{k} N$ . The value of work done will be …2023 · Numerical
A block is fastened to a horizontal spring. The block is pulled to a distance $x = 10 cm$ from its equilibrium position (at $x = 0$ ) on a frictionless surface from rest. The energy of the block at $x = 5 cm$ is $0.25 J$ …2023 · Numerical
A force $F = (5 + 3 y^{2})$ acts on a particle in the $y$ -direction, where $F$ is in newton and $y$ is in meter. The work done by the force during a displacement from $y = 2 m$ to $y = 5 m$ is …2023 · Numerical
A particle of mass $10 g$ moves in a straight line with retardation $(\frac{10}{x})^{- n}$ , where $x$ is the displacement in SI units. Its loss of kinetic energy for above displacement is $(\frac{10}{x})^{- n}$ J. The value of $n$ …2023 · Numerical
A body is dropped on ground from a height ' $h_{1}$ ' and after hitting the ground, it rebounds to a height ' $h_{2}$ '. If the ratio of velocities of the body just before and after hitting ground is 4 , then percentage loss in kinetic energy…2023 · Numerical