COMEDK 2023 Morning Shift | Center of Mass and Collision Question 1 | Physics

In the figure, pendulum bob on left side is pulled a side to a height $$h$$ from its initial position. After it is released it collides with the right pendulum bob at rest, which is of same mass. After the collision, the two bobs stick together and rise to a height

COMEDK 2023 Morning Shift Physics - Center of Mass and Collision Question 3 English

$$\frac{3 h}{4}$$

$$\frac{2 h}{3}$$

$$\frac{h}{2}$$

$$\frac{h}{4}$$

COMEDK 2023 Morning Shift

MCQ (Single Correct Answer)

-0

In the diagram shown below, $$m_1$$ and $$m_2$$ are the masses of two particles and $$x_1$$ and $$x_2$$ are their respective distances from the origin $$O$$.

COMEDK 2023 Morning Shift Physics - Center of Mass and Collision Question 2 English

The centre of mass of the system is

$$\frac{m_1 x_2+m_2 x_2}{m_1+m_2}$$

$$\frac{m_1+m_2}{2}$$

$$\frac{m_1 x_1+m_2 x_2}{m_1+m_2}$$

$$\frac{m_1 m_2+x_1 x_2}{m_1+m_2}$$

COMEDK 2023 Evening Shift

MCQ (Single Correct Answer)

-0

A neutron makes a head on elastic collision with a lead nucleus. The ratio of nuclear mass to neutron mass is 206 . The fractional change in kinetic energy of a neutron is

3% increase

2% decrease

2% increase

3% decrease

COMEDK 2022

MCQ (Single Correct Answer)

-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

$$v=\sqrt{2 g h}$$

$$v=\sqrt{2 g h}\left[1+\left(\frac{m}{M}\right)\right]$$

$$v=\sqrt{2 g h}\left(1+\sqrt{\frac{M}{m}}\right)$$

$$v=\sqrt{2 g h}\left[1-\left(\frac{m}{M}\right)\right]$$

COMEDK Subjects