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1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

A bullet of mass $m$ hits a mass $$M$$ and gets embedded in it. If the block rises to a height $$h$$ as a result of this collision, the velocity of the bullet before collision is

A
$$v=\sqrt{2 g h}$$
B
$$v=\sqrt{2 g h}\left[1+\left(\frac{m}{M}\right)\right]$$
C
$$v=\sqrt{2 g h}\left(1+\sqrt{\frac{M}{m}}\right)$$
D
$$v=\sqrt{2 g h}\left[1-\left(\frac{m}{M}\right)\right]$$
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

From a circular disc of radius R, a square is cut out with a radius as its diagonal. The centre of mass of remaining portion is at a distance (from the centre)

A
$${R \over {(4\pi - 2)}}$$
B
$${R \over {2\pi }}$$
C
$${R \over {\pi - 2}}$$
D
$${R \over {2\pi - 2}}$$
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following quantity represents the dimensions of momentum?

A
Impulse
B
Pressure
C
Viscosity
D
Power
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Centre of mass of the given system of particles will be at

COMEDK 2021 Physics - Center of Mass and Collision Question 9 English

A
OA
B
OB
C
OC
D
OD
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