1
AIEEE 2003
+4
-1
A car, moving with a speed of 50 km/hr, can be stopped by brakes after at least 6 m. If the same car is moving at a speed of 100 km/hr, the minimum stopping distance is
A
12 m
B
18 m
C
24 m
D
6 m
2
AIEEE 2003
+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
3
AIEEE 2003
+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
$$\sqrt {{\alpha ^2} + {\beta ^2}}$$
4
AIEEE 2002
+4
-1
From a building two balls A and B are thrown such that A is thrown upwards and B downwards ( both vertically with the same speed ). If vA and vB are their respective velocities on reaching the ground, then
A
$${v_B} > {v_A}$$
B
$${v_A} = {v_B}$$
C
$${v_A} > {v_B}$$
D
their velocities depend on their masses.
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