TS EAMCET · Physics · Work Power Energy
A body is moving up an inclined plane of angle \(\theta\) with an initial kinetic energy \(E\). The coefficient of friction between the plane and the body is \(u\). The work done against friction before the body comes to rest is
- A \(\frac{\mu \cos \theta}{E \cos \theta+\sin \theta}\)
- B \(E\)
- C \(\frac{\mu E \cos \theta}{\mu \cos \theta-\sin \theta}\)
- D \(\frac{\mu E \cos \theta}{\mu \cos \theta+\sin \theta}\) Increase in KE, \(\begin{aligned} \frac{p_2^2-p_1^2}{2 m} & =\frac{(10)^2-(8)^2}{2 \times 4} \ & =\frac{100-64}{8}=\frac{36}{8} \ & =4.5 \mathrm{~J}\end{aligned}\)
Answer & Solution
Correct Answer
(B) \(E\)
Step-by-step Solution
Detailed explanation
Acceleration of a body up a rough inclined plane \(a=g(\mu \cos \theta+\sin \theta)\) From equation of motion \(\begin{aligned} v^2 & =u^2-2 a s \\ 0 & =u^2-2 a s \\ u^2 & =2 a s \end{aligned}\) Initial \(\mathrm{KE}, E=\frac{1}{2} m u^2\)…
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
- An alternating voltage \(\varepsilon=30 \sin 200 t\) (in volts) is applied to the circuit below. The amplitude of the current through the circuit is
TS EAMCET 2020 Easy - A convex lens forms a real image of a point object placed on its principal axis. If the upper half of the lens is painted black, thenTS EAMCET 2023 Easy
- The balancing length for a cell is \(560 \mathrm{~cm}\) in a potentiometer experiment. When an external resistance of \(10 \Omega\) is connected in parallel to the cell, the balancing length changes by \(60 \mathrm{~cm}\). The internal resistance of the cell in ohms, isTS EAMCET 2002 Medium
- One mole of nitrogen gas being initially at a temperature of \(T_0=300 \mathrm{~K}\) is adiabatically compressed to increase its pressure 10 times. The final gas temperature after compression is (Assume, nitrogen gas molecules as rigid diatomic and \(100^{1 / 7}=1.9\) )TS EAMCET 2019 Easy
- Two masses \(m_1\) and \(m_2\) are placed on a smooth horizontal surface and are connected by a string of negligible mass. A horizontal force \(F\) is applied on the mass \(m_2\) as shown in the figure. The tension in the string isTS EAMCET 2016 Easy
- A given mass of a gas is compressed isothermally until its pressure is doubled. It is then allowed to expand adiabatically until its original volume is restored and its pressure is then found to be 0.75 of its initial pressure. The ratio of the specific heats of the gas is approximately :TS EAMCET 2006 Easy
More PYQs from TS EAMCET
- A long straight wire carrying current \(I\) and a rectangular frame with side lengths \(a\) and \(b\) lie in the same plane as shown in the figure. The mutual inductance of the wire and frame is
TS EAMCET 2021 Hard - A solid sphere and a thin uniform circular disc of same radius are rolling down an inclined plane without slipping. If the acceleration of the sphere is \(3 \mathrm{~ms}^{-2}\), then the acceleration of the disc isTS EAMCET 2025 Medium
- The electromagnetic waves of frequency \(6 \mathrm{GHz}\) are used inTS EAMCET 2020 Medium
- Assertion (a) : Ductile metals are used to prepare thin wires.Reason (R): In the stress-strain curve of ductile metals, the length between the points representing elastic limit and breaking point is very small.TS EAMCET 2006 Easy
- A square loop of length \(L\) is placed with its edges parallel to the \(X Y\)-axes. The loop is carrying the current \(I\). If the magnetic field in the region varies as \(\mathbf{B}=B_0\left(1+\frac{X y}{L^2}\right) \hat{\mathbf{k}}\), then the magnitude of the force on the loop will beTS EAMCET 2018 Medium
- Two sound waves each of intensity I are superimposed. If the phase difference between the waves is \(\frac{\pi}{2}\), then the intensity of the resultant wave isTS EAMCET 2025 Medium