1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is :
A
4 m s$$-$$2 upwards
B
4 m s$$-$$2 downwards
C
14 m s$$-$$2 upwards
D
30 m s$$-$$2 downwards
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A body, under the action of a force $$\overrightarrow F = 6\widehat i - 8\widehat j + 10\widehat k,$$ acquires an accelerations of 1 m/s2. The mass of this body must be
A
10 kg
B
20 kg
C
10$$\sqrt 2$$ kg
D
2$$\sqrt {10}$$ kg
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A roller coaster is designed such that riders experience ''weightlessness'' as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between
A
16 m/s and 17 m/s
B
13 m/s and 14 m/s
C
14 m/s and 15 m/s
D
15 m/s and 16 m/s
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Sand is being dropped on a conveyer belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of $$\upsilon$$ m/s will be :
A
$${{Mv} \over 2}$$ newton
B
zero
C
M$$v$$ newton
D
2 M$$v$$ newton
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