1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

A shell of mass m is at rest initially. It explodes into three fragments having mass in the ratio 2 : 2 : 1. If the fragments having equal mass fly off along mutually perpendicular directions with speed v, the speed of the third (lighter) fragment is :

A
v
B
$$\sqrt2$$v
C
2$$\sqrt2$$v
D
3$$\sqrt2$$v
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Two objects of mass 10 kg and 20 kg respectively are connected to the two ends of a rigid rod of length 10 m with negligible mass. The distance of the center of mass of the system from the 10 kg mass is :

A
$${{10} \over 3}$$ m
B
$${{20} \over 3}$$ m
C
10 m
D
5 m
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A ball of mass 0.15 kg is dropped from a height 10m, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is (g = 10 m/s2) nearly :
A
1.4 kg m/s
B
0 kg m/s
C
4.2 kg m/s
D
2.1 kg m/s
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass.
The centre of mass of the system from the 5 kg particle is nearly at a distance of :
A
50 cm
B
67 cm
C
80 cm
D
33 cm
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