1
MHT CET 2021 21th September Evening Shift
+1
-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

A
10 mv
B
5 mv
C
$$\frac{1}{5}$$ mv
D
$$\frac{1}{10}$$ mv
2
MHT CET 2021 21th September Morning Shift
+1
-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

A
$$\frac{M}{m}$$
B
$$\frac{m+M}{M}$$
C
$$\frac{M-m}{M+m}$$
D
$$\frac{\mathrm{m}}{\mathrm{M}}$$
3
MHT CET 2021 20th September Evening Shift
+1
-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

A
$$\frac{v_a+v_b}{v_a-v_b}$$
B
$$\frac{1}{2}$$
C
1
D
$$\frac{v_a-v_b}{v_a+v_b}$$
4
MHT CET 2020 16th October Morning Shift
+1
-0

A bullet of mass $$m$$ moving with velocity $$v$$ is fired into a wooden block of mass $$M$$, If the bullet remains embedded in the block, the final velocity of the system is

A
$$\frac{m+M}{m}$$
B
$$\frac{M+m}{m v}$$
C
$$\frac{m v}{m+M}$$
D
$$\frac{v}{m(M+m)}$$
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