MHT CET · Physics · Laws of Motion
A body is moving along the horizontal surface with a velocity of \(4 \mathrm{~m} / \mathrm{s}\). If the coefficient of kinetic friction is \(0.2\), the distance travelled by body before coming to rest is \(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
- A \(8 \mathrm{~m}\)
- B \(16 \mathrm{~m}\)
- C \(4 \mathrm{~m}\)
- D \(6 \mathrm{~m}\)
Answer & Solution
Correct Answer
(C) \(4 \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
\(f=\mu \mathrm{mg}\).
\(\therefore a=-f / m=-\frac{\mu m g}{m}=-\mu g=-(0.2) 10=-2\)
\(v^{2}=u^{2}+2 a s\)
\(s=4\)
\(\therefore a=-f / m=-\frac{\mu m g}{m}=-\mu g=-(0.2) 10=-2\)
\(v^{2}=u^{2}+2 a s\)
\(s=4\)
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 parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first maximum of the diffraction pattern, the phase difference between the rays coming from the edges of the slit isMHT CET 2022 Medium
- A wire of Young's modulus \(1 \cdot 6 \times 10^{12} \mathrm{~N} / \mathrm{m}^{2}\) is stretched by a force so as to produce a strain of \(2 \times 10^{-4}\). The energy density of the wire isMHT CET 2020 Medium
- The temperature of a liquid falls from 365 K to 359 K in 3 minutes. The time during which temperature of this liquid falls from 342 K to 338 K is [Let the room temperature be 296 K ]MHT CET 2024 Hard
- A body of mass ' \(\mathrm{m}\) ' is raised through a height above the earth's surface so that the increase in potential energy is \(\frac{\mathrm{mgR}}{5}\). The height to which the body is raised is ( \(\mathrm{R}=\) radius of earth, \(\mathrm{g}=\) acceleration due to gravity)MHT CET 2023 Medium
- A gas at pressure \(\mathrm{P}_0\) is contained in a vessel. If the masses of all the molecules are halved and their velocities are doubled, the resulting pressure would be equal toMHT CET 2023 Medium
- In an n-p-n transistor amplifier, the collector current is 8 mA . If \(80 \%\) of the electrons from the emitter reach the collector, then ( \(\alpha\) and \(\beta\) are current ratios)MHT CET 2025 Medium
More PYQs from MHT CET
- A rectangular block of mas \(M\) and cross-sectional area \(A\) floats on a liquid of density \(\rho\). It is given a small vertical displacement from equilibrium; it starts oscillating with frequency \(n\) thenMHT CET 2022 Medium
- The number of metamers possible for \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) isMHT CET 2010 Medium
- Microspore mother cells in anther are immediately enclosed byMHT CET 2024 Easy
- The dimensions of Planck's constant are same as the product ofMHT CET 2020 Easy
- The change in the internal energy of the mass of gas, when the volume changes from V to 2 V at constant pressure P is \(\left(\gamma=\mathrm{C}_{\mathrm{P}} / \mathrm{C}_{\mathrm{V}}\right)\)MHT CET 2025 Medium
- If both mean and variance of 50 observations \(x_1, x_2, \ldots, x_{50}\) are equal to 16 and 256 respectively, then mean of \(\left(x_1-5\right)^2,\left(x_2-5\right)^2, \ldots \ldots,\left(x_{50}-5\right)^2\) isMHT CET 2023 Hard