TS EAMCET · Physics · Work Power Energy
A horizontal force of 10 N is applied on a block of mass 1.5 kg which is initially at rest on a rough horizontal surface. The work done by the applied force in a time of 6 s from the beginning of the motion is (Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\); the coefficient of kinetic friction between the block and the surface is 0.2 )
- A 588 J
- B 360 J
- C 840 J
- D 420 J
Answer & Solution
Correct Answer
(C) 840 J
Step-by-step Solution
Detailed explanation
\( N = mg \) \( N = 1.5 \times 10 = 15 \mathrm{~N} \) \( f_k = \mu_k N \) \( f_k = 0.2 \times 15 = 3 \mathrm{~N} \) \( F_{net} = F_{applied} - f_k \) \( F_{net} = 10 - 3 = 7 \mathrm{~N} \) \( a = \frac{F_{net}}{m} \) \( a = \frac{7}{1.5} = \frac{14}{3} \mathrm{~ms^{-2}} \)…
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
- A bullet fired into a target losses one-third of its velocity after travelling a distance meter into the target. If the bullet comes to rest by travelling a further distance , then the ratio isTS EAMCET 2022 Easy
- When a body is acted upon by a resultant force, then the work done by the resultant force is equal toTS EAMCET 2020 Easy
- A \(750 \mathrm{~kg}\) boat is \(10 \mathrm{~m}\) long and is floating without motion on still water. A man of mass \(80 \mathrm{~kg}\) is at one end and if he runs to another end of the boat and stops, the displacement of boat isTS EAMCET 2021 Medium
- Consider a physical quantity, expressed as If the relative error in the magnitudes of and is then the relative error in will be,TS EAMCET 2021 Medium
- The wrong statement in the following isTS EAMCET 2020 Medium
- A cylindrical resistor of radius \(7.0 \mathrm{~mm}\) and length 4.0 \(\mathrm{cm}\) is made of material that has a resistivity of \(10^{-6} \Omega . \mathrm{m}\). If the energy is dissipated at rate \(1.54 \mathrm{~W}\) in the resistor, then the current density isTS EAMCET 2022 Medium
More PYQs from TS EAMCET
- A sinusoidal voltage with a frequency of is applied to a series circuit with a resistance of , inductance of and a capacitance of . The magnitude of impedance of the circuit is close toTS EAMCET 2019 Medium
- If the ratio of densities of two substances is \(5: 6\) and the ratio of their specific heat capacities is \(3: 5\), then the ratio of heat energies required per unit volume so that the two substances can have same temperature rise isTS EAMCET 2023 Medium
- A horizontal pipe of non-uniform cross-section allows water to flow through it with a velocity \(1 \mathrm{~ms}^{-1}\) when pressure is \(50 \mathrm{kPa}\) at a point. If the velocity of flow has to be \(2 \mathrm{~ms}^{-1}\) at some other point, the pressure at that point should beTS EAMCET 2007 Hard
- The equivalent capacitance between points and is
TS EAMCET 2022 Easy - In Huygen's eyepieceTS EAMCET 2007 Easy
- The frequency of light emitted, when the electron makes transition from the level of principle quantum number \(n=2\) to the level with \(n=1\) is (Take, the ionization energy of hydrogen to be \(13.6 \mathrm{eV}\) and \(h \simeq 4 \times 10^{-15} \mathrm{eV}\)-s)TS EAMCET 2018 Easy