1
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$\mathrm{f}\left(\frac{1}{\mathrm{~K}_1}+\frac{1}{\mathrm{~K}_2}\right)$$
B
$$\mathrm{f}\left(\frac{1}{\mathrm{~K}_1}-\frac{1}{\mathrm{~K}_2}\right)$$
C
$$\mathrm{f}\left(\mathrm{K}_1+\mathrm{K}_2\right)$$
D
$$\mathrm{f}\left(\mathrm{K}_1-\mathrm{K}_2\right)$$
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A wooden black of mass '$$\mathrm{m}$$' moves with velocity '$$\mathrm{V}$$' and collides with another block of mass '$$4 \mathrm{~m}$$', which is at rest. After collision the block of mass '$$\mathrm{m}$$' comes to rest. The coefficient of restitution will be

A
0.7
B
0.25
C
0.4
D
0.5
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

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 3 English

A
7.5 m/s
B
12.5 m/s
C
10 m/s
D
15 m/s
4
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+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
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