AP EAMCET · PHYSICS · Center of Mass Momentum and Collision
Two bodies of masses M and 4M initially at rest, start moving towards each other due to their mutual attraction. The velocity of their centre of mass when the first body attains a velocity \(\mathrm{v}_0\) is
- A zero
- B \(-v_0\)
- C \(2 \mathrm{v}_0\)
- D \(-4 v_0\)
Answer & Solution
Correct Answer
(A) zero
Step-by-step Solution
Detailed explanation
\(V_{CM} = \frac{m_1 u_1 + m_2 u_2}{m_1 + m_2}\) \(V_{CM} = \frac{M(0) + 4M(0)}{M + 4M} = 0\)
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 object of mass \(10 \mathrm{~kg}\) is released from rest in a liquid. If the object moves a distance of \(2 \mathrm{~m}\) while sinking in time duration of \(1 \mathrm{~s}\), then the mass of the liquid displaced by the submerged object is
\(\left(\right.\) Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-2}\) )AP EAMCET 2022 Easy - In a potentiometer experiment, the balancing with a cell is at length \(250 \mathrm{~cm}\). In shunting the cell with a resistance of \(2 \Omega\), the balancing length becomes \(125 \mathrm{~cm}\). The internal resistance of the cell isAP EAMCET 2021 Medium
- For television broadcasting the frequency employed is normally in range,AP EAMCET 2020 Easy
- A cannon shell fired breaks into two equal parts at its highest point. One part retraces the path to the cannon with kinetic energy \(E_1\) and kinetic energy of the second part is \(E_2\), relation between \(E_1\) and \(E_2\) isAP EAMCET 2014 Hard
- The radius of the first orbit of hydrogen is \(\mathrm{r}_{\mathrm{H}}\), and the energy in the ground state is - \(13.6 \mathrm{eV}\). Considering a \(\mu^{-}\)-particle with a mass \(207 m_e\) revolving round a proton as in hydrogen atom, the energy and radius of proton and \(\mu^{-}\)- combination respectively in the first orbit are (assume nucleus to be stationary)AP EAMCET 2014 Hard
- Assertion (A) Half of the charge of an electron does not exist. Reason (R) Electric charge is quantized.AP EAMCET 2019 Easy
More PYQs from AP EAMCET
- Let \(\mathrm{C}\) be the centre and \(\mathrm{A}\) be one end of a diameter of the circle \(x^2+y^2-2 x-4 y-20=0\). If \(P\) is a point on \(A C\) such that \(\mathrm{A}\) divides \(\mathrm{CP}\) in the ratio \(2: 3\), then the locus of \(\mathrm{P}\) isAP EAMCET 2023 Easy
- If \(a \neq p, b \neq q, c \neq r\) and \(\left|\begin{array}{ccc}p & b & c \\ p+a & q+b & 2 c \\ a & b & r\end{array}\right|=0\), then \(\frac{p}{p-a}+\frac{q}{q-b}+\frac{r}{r-c}\) is equal to :AP EAMCET 2003 Easy
- The mass of ascorbic acid \(\left(\mathrm{C}_6 \mathrm{H}_8 \mathrm{O}_6\right)\) to be dissolved in \(100 \mathrm{~g}\) of acetic acid to lower its freezing point by \(1.5^{\circ} \mathrm{C}\) in \(\mathrm{g}\) is :AP EAMCET 2018 Hard
- The capacitance of a spherical condenser is \(1 \mu \mathrm{F}\). If the spacing between the two spheres is \(1 \mathrm{~mm}\), the radius of the outer sphere isAP EAMCET 2020 Easy
- If the line joining the points \((k, 2,3)\) and \((1,1,2)\) is parallel to the line joining the points \((5,4,-1)\) and \((3,2,-3)\), then the value of \(k\) is equal toAP EAMCET 2021 Medium
- Calculate the number of protons, neutrons and electrons in \({ }_{16}^{32} \mathrm{~S}^{2-}\).AP EAMCET 2020 Easy