1
AIPMT 2010 Prelims
+4
-1
A block of mass m is in contact with the cart C as shown in the figure.

The coefficient of static friction between the block and the cart is $$\mu$$. The acceleration $$\alpha$$ of the cart that will prevent the block from falling satisfies

A
$$\alpha > {{mg} \over \mu }$$
B
$$\alpha > {g \over {\mu m}}$$
C
$$\alpha \ge {g \over \mu }$$
D
$$\alpha < {g \over \mu }$$
2
AIPMT 2009
+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
3
AIPMT 2009
+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
4
AIPMT 2008
+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
EXAM MAP
Medical
NEET