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

If a soap bubble expands, the pressure inside the bubble

A
Decreases
B
Increases
C
Remains the same
D
Is equal to the atmospheric pressure
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

An electric lift with a maximum load of 2000 kg (lift + passengers) is moving up with a constant speed of 1.5 ms$$-$$1. The frictional force opposing the motion is 3000 N. The minimum power delivered by the motor to the lift in watts is : (g = 10 ms$$-$$2)

A
23000
B
20000
C
34500
D
23500
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