AP EAMCET · PHYSICS · Center of Mass Momentum and Collision
A bullet of mass \(0.02 \mathrm{~kg}\) travelling horizontally with velocity \(250 \mathrm{~ms}^{-1}\) strikes a block of wood of mass \(0.23 \mathrm{~kg}\) which rests on a rough horizontal surface. After the impact, the block and bullet move together and come to rest after travelling a distance of \(40 \mathrm{~m}\). The coefficient of sliding friction of the rough surface is \(\left(g=9.8 \mathrm{~ms}^{-2}\right)\)
- A 0.75
- B 0.61
- C 0.51
- D 0.3
Answer & Solution
Correct Answer
(C) 0.51
Step-by-step Solution
Detailed explanation
After impact the bullet and block move together and comes to rest after covering a distance of \(40 \mathrm{~m}\). By conservation of momentum \(\begin{gathered} m_1 u_1+m_2 u_2=m_1 v_1+m_2 v_2 \\ \text { or } \quad 0.02 \times 250+0.23 \times 0=0.02 v+0.23 v \end{gathered}\)…
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
- Magnetic field at the centre of a circular loop of area \(A\) is \(B\). Then the magnetic moment of the loop is
(\(\mu_0\)-permeability of the free space)AP EAMCET 2019 Easy - A gas is compressed from a volume of \(2 \mathrm{~m}^3\) to a volume of \(1 \mathrm{~m}^3\) at a constant pressure of \(100 \mathrm{Nm}^{-2}\). Then it is heated at constant volume by supplying \(150 \mathrm{~J}\) of energy. As a result, the internal energy of the gasAP EAMCET 2020 Medium
- Three polaroid sheets are kept parallel to each other such that first and last are crossed. Unpolarised light of intensity \(32 \mathrm{Wm}^{-2}\) falls normally on the first sheet and passes through all the polaroid sheets. If the intensity of the emerging light from the third sheet is \(3 \mathrm{Wm}^{-2}\), then the angle between the axes of the first two polaroid sheets isAP EAMCET 2017 Medium
- A horizontal overhead powerline at a height of \(5 \mathrm{~m}\) from the ground and carries a current of \(150 \mathrm{~A}\) from East to West. The magnetic field directly below it on ground isAP EAMCET 2020 Medium
- A beaker is filled completely with water at \(4^{\circ} \mathrm{C}\). Identify the incorrect statement.AP EAMCET 2021 Medium
- Two point charges \(-5 \mu \mathrm{C}\) and \(+5 \mu \mathrm{C}\) are placed at \(\mathrm{A}\) and \(\mathrm{B}\) respectively on a straight line separated by \(5 \mathrm{~cm}\). At a point \(\mathrm{C}\) if the resultant field is parallel to the line joining the points \(A\) and \(B\) thenAP EAMCET 2018 Easy
More PYQs from AP EAMCET
- If the circles \(x^2+y^2-6 x-8 y-12=0\) and \(x^2+y^2-4 x+6 y+k=0\) are perpendicular to each other, then ' \(k\) ' equalsAP EAMCET 2021 Easy
- The equation of the locus of a point \(P(x, y, z)\) such that it's distance from the \(X\)-axis is equal to its distance from the plane \(x+z=1\) isAP EAMCET 2020 Medium
- The variance of the random variable \(X\) having the following distribution
AP EAMCET 2018 Medium - The condition that \(f(x)=a x^3+b x^2+c x+d\) has no extreme value, isAP EAMCET 2014 Hard
- A long thin hollow metallic cylinder of radius has a current ampere. The magnetic induction away from the axis at a distance from the axis varies as shown in
AP EAMCET 2021 Medium - The atomic numbers of elements \(A, B, C\) and \(D\) are \(Z-1, Z, Z+1\) and \(Z+2\), respectively. If ' \(B\) ' is a noble gas, choose the correct answers from the following statements
(1) ' \(A\) ' has higher electron affinity
(2) ' \(C\) ' exists in +2 oxidation state
(3) ' \(D\) ' is an alkaline earth metalAP EAMCET 2008 Easy