COMEDK 2025 Morning Shift | Center of Mass and Collision Question 4 | Physics

A bomb of mass 20 kg at rest explodes into two pieces of masses 12 kg and 8 kg . If the velocity of 8 kg mass is $6 \mathrm{~ms}^{-1}$, then the kinetic energy of the other mass is:

144 J

64 J

86 J

96 J

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

From a circular disc of radius 2 R , a smaller circular disc is cut with radius of the larger disc as its diameter. The centre of the hole is at a distance of $R$ from the centre of the original disc. The distance of the centre of mass of the remaining portion from the centre is:

$\frac{R}{3}$

$\frac{R}{4}$

$\frac{R}{6}$

$\frac{R}{2}$

COMEDK 2024 Morning Shift

MCQ (Single Correct Answer)

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Which of the following graph shows the variation of velocity with mass for the constant momentum?

COMEDK 2024 Morning Shift Physics - Center of Mass and Collision Question 6 English

Fig 3

Fig 1

Fig 2

Fig 4

COMEDK 2024 Morning Shift

MCQ (Single Correct Answer)

-0

Which of the following statement is true regarding the centre of mass of a system?

The centre of mass depends on the size and shape but does not depend on the distribution of mass of the body.

The centre of mass depends on the coordinate system.

The centre of mass of a system depends on the size and shape of the body but independent of the co-ordinate system

The centre of mass of a body always lies inside the body.

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