1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A 0.5 kg ball moving with a speed of 12 m/s strikes a hand wall at an angle of 30o with the wall. It is reflected with the same speed at the same angle. If the ball is in contact with the wall for 0.25 seconds, the average force acting on the wall is :
A
96 N
B
48 N
C
24 N
D
12 N
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
300 J of work is done in sliding a 2 kg block up an inclined plane of height 10 m. Work done against friction is (Take g = 10 m/s2)
A
1000 J
B
200 J
C
100 J
D
zero
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A body of mass 3 kg is under a constant force which causes a displacement s in metres in it, given by the relation s = $${1 \over 3}$$t2, where t is in seconds. Work done by the force in 2 seconds is
A
$${{19} \over 5}J$$
B
$${5 \over {19}}J$$
C
$${3 \over {8}}J$$
D
$${8 \over {3}}J$$
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential energy stored in it is
A
U/4
B
4U
C
8U
D
16U
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