1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A body is moving with velocity 30 m/s towards east . After 10 seconds its velocity becomes 40 m/s towards north. The average acceleration of the body is
A
1 m/s2
B
7 m/s2
C
$$\sqrt 7 $$ m/s2
D
5 m/s2
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0 m/s2. If g = 10 ms$$-$$2, the tension in the supporting cable is
A
8600 N
B
9680 N
C
11000 N
D
1200 N
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity. The impulse experienced by the body is
A
MV
B
1.5 MV
C
2MV
D
zero
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The potential energy of a system increases if work is done
A
upon the system by a nonconservative force
B
by the system agains is a conservative force.
C
by the system against a nonconservative force.
D
upon the system by a conservative force.
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