MHT CET 2021 22th September Evening Shift | Center of Mass and Collision Question 19 | Physics

Force is applied to a body of mass $$2 \mathrm{~kg}$$ at rest on a frictionless horizontal surface as shown in the force against time $$(F-t)$$ graph. The speed of the body after 1 second is

MHT CET 2021 22th September Evening Shift Physics - Center of Mass and Collision Question 15 English

7.5 m/s

12.5 m/s

10 m/s

15 m/s

MHT CET 2021 21th September Evening Shift

MCQ (Single Correct Answer)

-0

A molecule of mass 'm' moving with velocity 'v' makes 5 elastic collisions with a wall of container per second. The change in momentum of the wall per second in 5 collisions will be

10 mv

5 mv

$$\frac{1}{5}$$ mv

$$\frac{1}{10}$$ mv

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

A particle of mass '$$m$$' collides with another stationary particle of mass '$$M$$'. A particle of mass '$$\mathrm{m}$$' stops just after collision. The coefficient of restitution is

$$\frac{M}{m}$$

$$\frac{m+M}{M}$$

$$\frac{M-m}{M+m}$$

$$\frac{\mathrm{m}}{\mathrm{M}}$$

MHT CET 2021 20th September Evening Shift

MCQ (Single Correct Answer)

-0

Two masses '$$m_{\mathrm{a}}$$' and '$$\mathrm{m}_{\mathrm{b}}$$' moving with velocities '$$v_{\mathrm{a}}$$' and '$$v_{\mathrm{b}}$$' opposite directions collide elastically. Alter the collision '$$m_a$$' and '$$m_b$$' move with velocities and '$$v_{\mathrm{b}}$$' and '$$v_a$$' respectively, then the ratio $$\mathrm{m_a:m_b}$$ is

$$\frac{v_a+v_b}{v_a-v_b}$$

$$\frac{1}{2}$$

$$\frac{v_a-v_b}{v_a+v_b}$$

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