AP EAMCET · PHYSICS · Work Power Energy
A body is released from a height of vertically downwards. The speed of the body at which potential energy is twice that of kinetic energy is (Acceleration due to gravity )
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Suppose at velocity v,potential energy of body is twice that of kinetic energy. Using energy conservation- mgH=KEf+PEf …1 Since PEf=2×KEf Put this value in equation 1- mgH=3×KEf ⇒ mgH=3×12mv2 ⇒ v=23gH…
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
- If a straight current carrying wire of linear density \(0.12 \mathrm{~kg} \mathrm{~m}^{-1}\) is suspended in mid air by a uniform horizontal magnetic field of 0.5 T normal to the length of the wire, then the current through the wire is
(Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-2}\); Neglect earth's magnetic field)AP EAMCET 2025 Medium - Ball \(A\) of mass \(1 \mathrm{~kg}\) moving along a straight line with a velocity of \(4 \mathrm{~ms}^{-1}\) hits another ball \(B\) of mass \(3 \mathrm{~kg}\) which is at rest. After collision, they stick together and move with the same velocity along the same straight line. If the time of impact of the collision is \(0.1 \mathrm{~s}\) then the force exerted on \(B\) isAP EAMCET 2022 Hard
- A whistle of frequency \(540 \mathrm{~Hz}\) rotates in a horizontal circle of radius \(2 \mathrm{~m}\) at an angular speed of \(15 \mathrm{rad} / \mathrm{s}\). The highest frequency heard by a listener at rest with respect to the centre of circle (velocity of sound in air \(=330 \mathrm{~ms}^{-1}\) )AP EAMCET 2007 Easy
- A battery of emf \(10 \mathrm{~V}\) is connected to a uniform wire \(A B\) of \(1 \mathrm{~m}\) length and having a resistance of \(10 \Omega\) in series with a \(10 \Omega\) resistor as shown in the figure. Two cells of emf \(2 \mathrm{~V}\) and \(3 \mathrm{~V}\) having internal resistance \(2 \Omega\) and \(3 \Omega\), respectively are connected as shown in the figure. If the galvanometer shows null deflection at point \(J\) on the wire, then the distance of point \(J\) from the point \(B\) is.
AP EAMCET 2018 Hard - The threshold wavelength of a photosensitive material is equal to the frequency of \(\mathrm{H}_{\mathrm{a}}\) line of hydrogen. If a photon whose frequency equal to the frequency of \(\mathrm{H}_{\mathrm{b}}\) line of hydrogen is incident on this photosensitive material, the maximum kinetic energy of the emitted photoelectrons is (R-Rydberg's constant, h- Flanck's constant and c- speed of light in vacuum)AP EAMCET 2023 Medium
- The relation between time ' \(t\) ' and displacement ' \(x\) ' is \(t=\alpha x^2+\beta x\) where \(\alpha\) and \(\beta\) are constants. If ' \(v\) ' is the velocity, the retardation isAP EAMCET 2024 Medium
More PYQs from AP EAMCET
- The coefficient of \(x^{50}\) in the expansion of \((\mathrm{l}+x)^{1000}+x(\mathrm{l}+x)^{999}\) \(+x^2(1+x)^{998}+\ldots+x^{1000}\) isAP EAMCET 2020 Medium
- A body is projected at an angle of with the horizontal such that the vertical component of its initial velocity is . The magnitude of velocity of the projectile at one quarter of its time of flight is nearly (Acceleration due to gravity )AP EAMCET 2019 Medium
- Three solid spheres each of mass \(1 \mathrm{~kg}\) and radius \(2 \mathrm{~m}\) are arranged at the three corners of an equilateral triangle of side \(10 \mathrm{~m}\), such that centres of the spheres coincide with the comers of the triangle. When they are released from that position, the speed of any one sphere at the time of collision would be (\(\mathrm{G}\) is universal gravitational constant).AP EAMCET 2017 Easy
- In \(\triangle \mathrm{ABC}\), if \(r_1=3, r_2=10\) and \(r_3=15\), then \(\mathrm{R}=\)AP EAMCET 2017 Easy
- If the length of the tangent drawn from the point from \((-2,3)\) to the circle \(x^2+y^2+8 x\) \(-6 y+k=0\) is 4 units, then \(k\) is equal toAP EAMCET 2021 Easy
- Two blocks and of masses and respectively are connected by a massless inextensible string passing over a frictionless pulley as shown in the figure. Block A is lifted until block B touches the ground and then block A is released. The initial height of block A is when block B just touches the ground. The maximum height reached by block from the ground after the block A falls on the ground is
AP EAMCET 2019 Hard