COMEDK · Physics · 7. Center of Mass Momentum and Collision
A bomb of mass \(18 \mathrm{~kg}\) at rest explodes into two pieces of masses \(6 \mathrm{~kg}\) and \(12 \mathrm{~kg}\). The velocity of \(12 \mathrm{~kg}\) mass is \(4 \mathrm{~m} / \mathrm{s}\). The kinetic energy of the other mass is
- A \(288 \mathrm{~J}\)
- B 192 J
- C \(96 \mathrm{~J}\)
- D \(144 \mathrm{~J}\)
Answer & Solution
Correct Answer
(B) 192 J
Step-by-step Solution
Detailed explanation
Mass of bomb, \(M=18 \mathrm{~kg}\) Mass of pieces, \(m_{1}=6 \mathrm{~kg}, m_{2}=12 \mathrm{~kg}\) Velocity of \(12 \mathrm{~kg}\) mass, \(v_{2}=4 \mathrm{~m} / \mathrm{s}\) Let \(v_{1}\) be the velocity of \(6 \mathrm{~kg}\) mass. According to conservation of linear momentum,…
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
- Current flows through uniform, square frames and their connecting wires as shown in the figure. In which case is the net magnetic field at the centre of the frame not zero?
COMEDK 2024 Medium - A calcite crystal is placed over a dot on a paper sheet and the crystal is rotate(d) On viewing through the calcite or sees,COMEDK 2016 Medium
- Point charges \(-3 \mathrm{Q},-\mathrm{q}, 2 \mathrm{q}\) and 2 Q are placed, one at each corner of a square. The relation between Q and q for which the potential at the centre of the square is zero isCOMEDK 2025 Easy
- If \(M\) is the atomic mass and \(A\) is the mass number, packing fraction is given byCOMEDK 2019 Medium
- A capacitor of \(10 \mu \mathrm{F}\) is connected to a \(10 \mathrm{~V}\) cell. The maximum charge on the capacitor will beCOMEDK 2012 Easy
- Two point charges \(A=+3 \mathrm{nC}\) and \(B=+1 \mathrm{nC}\) are placed \(5 \mathrm{~cm}\) apart in air. The work done to move charge \(B\) towards \(A\) by \(1 \mathrm{~cm}\) isCOMEDK 2020 Easy
More PYQs from COMEDK
- Which of the following is diamagnetic?COMEDK 2018 Medium
- Identify \([\mathrm{X}]\) used in the given reaction.
\([\mathrm{X}]+\) Copper \(/ 573 \mathrm{~K} \rightarrow[\mathrm{Y}]\)
\([\mathrm{Y}] \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O} / \mathrm{H}^{+}]{\text {(i) } \mathrm{CH}_3 \mathrm{MgBr}}\) Tert.butyl alcohol. (major product)COMEDK 2025 Medium - A beam of light parallel to the principal axis of a concave and convex lens, first passes through the concave lens of focal length 0.5 m and then through the convex lens of focal length 1.75 m . If the lenses are placed 1.25 apart, which of the given statement is true?COMEDK 2025 Medium
- Energy is stored in our body in the form ofCOMEDK 2013 Easy
- A solution of \(\mathrm{KCl}(\mathrm{M}=74.5 \mathrm{~g} \mathrm{~mol}^{-1})\) containing \(1.9 \mathrm{~g}\) per \(100 \mathrm{~mL}\) of \(\mathrm{KCl}\) is isotonic with a solution of urea \((\mathrm{M}=60.0 \mathrm{~g} \mathrm{~mol}^{-1}\)) containing \(3 \mathrm{~g}\) per \(100 \mathrm{~mL}\) of urea. The degree of dissociation of \(\mathrm{KCl}\) is:
[Assume both the solutions are kept at same temperature]COMEDK 2024 Medium - If \(x=a t+b t^{2}\), where \(x\) is measured in metre and \(t\) in second, then the dimension of \((b / a)\) isCOMEDK 2012 Easy