1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle of $$30^\circ $$ with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground? $$\left[ {g = 10m/{s^2},\sin 30^\circ = {1 \over 2},\cos 30^\circ = {{\sqrt 3 } \over 2}} \right]$$
A
5.20 m
B
4.33 m
C
2.60 m
D
8.66 m
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
The co-ordinates of a moving particle at any time 't' are given by x = $$\alpha $$t3 and y = βt3. The speed to the particle at time 't' is given by
A
$$3t\sqrt {{\alpha ^2} + {\beta ^2}} $$
B
$$3{t^2}\sqrt {{\alpha ^2} + {\beta ^2}} $$
C
$${t^2}\sqrt {{\alpha ^2} + {\beta ^2}} $$
D
$$\sqrt {{\alpha ^2} + {\beta ^2}} $$
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads $$49$$ $$N,$$ when the lift is stationary. If the lift moves downward with an acceleration of $$5 m/{s^2}$$, the reading of the spring balance will be
A
$$24$$ $$N$$
B
$$74$$ $$N$$
C
$$15$$ $$N$$
D
$$49$$ $$N$$
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A light spring balance hangs from the hook of the other light spring balance and a block of mass $$M$$ $$kg$$ hangs from the former one. Then the true statement about the scale reading is
A
Both the scales read $$M$$ $$kg$$ each
B
The scale of the lower one reads $$M$$ $$kg$$ and of the upper one zero
C
The reading of the two scales can be anything but the sum of the reading will be $$M$$ $$kg$$
D
Both the scales read $$M/2$$ $$kg$$ each
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