MHT CET 2023 10th May Evening Shift | Center of Mass and Collision Question 14 | Physics

A mass '$$\mathrm{M}$$' moving with velocity '$$\mathrm{V}$$' along $$\mathrm{X}$$-axis collides and sticks to another mass $$2 \mathrm{M}$$ which is moving along $$\mathrm{Y}$$-axis with velocity '$$3 \mathrm{~V}$$'. The velocity of the combination after collision is

$$\frac{V}{3} \hat{i}+2 V \hat{j}$$

$$\frac{V}{2} \hat{i}+V \hat{j}$$

$$\frac{V}{3} \hat{i}-2 V \hat{j}$$

$$\frac{V}{2} \hat{i}-V \hat{j}$$

MHT CET 2023 9th May Evening Shift

MCQ (Single Correct Answer)

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Consider the following statements $$\mathrm{A}$$ and $$\mathrm{B}$$. Identify the correct choice in the given answers.

A. In an inelastic collision, there is no loss in kinetic energy during collision.

B. During a collision, the linear momentum of the entire system of particles is conserved if there is no external force acting on the system.

Both $$\mathrm{A}$$ and $$\mathrm{B}$$ are wrong.

Both A and B are correct.

$$\mathrm{A}$$ is wrong and $$\mathrm{B}$$ is correct.

A is correct and B is wrong.

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

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A body falls on a surface of coefficient of restitution 0.6 from a height of $$1 \mathrm{~m}$$. Then the body rebounds to a height of

1 m

0.36 m

0.4 m

0.6 m

MHT CET 2022 11th August Evening Shift

MCQ (Single Correct Answer)

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Two massless springs of spring constant $$\mathrm{K}_1$$ and $$\mathrm{K}_2$$ are connected one after the other forming a single chain, suspended vertically and certain mass is attached to the free end. If '$$e_1$$' and '$$e_2$$' are their respective extensions and '$$\mathrm{f}$$' is their stretching force, the total extension produced is

$$\mathrm{f}\left(\frac{1}{\mathrm{~K}_1}+\frac{1}{\mathrm{~K}_2}\right)$$

$$\mathrm{f}\left(\frac{1}{\mathrm{~K}_1}-\frac{1}{\mathrm{~K}_2}\right)$$

$$\mathrm{f}\left(\mathrm{K}_1+\mathrm{K}_2\right)$$

$$\mathrm{f}\left(\mathrm{K}_1-\mathrm{K}_2\right)$$

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