1
AIEEE 2004
+4
-1
A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in $${T \over 3}$$ seconds?
A
$${{8h} \over 9}$$ meters from the ground
B
$${{7h} \over 9}$$ meters from the ground
C
$${h \over 9}$$ meters from the ground
D
$${{7h} \over {18}}$$ meters from the ground
2
AIEEE 2004
+4
-1
An automobile travelling with speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is going twice as fast, i.e 120 km/h, the stopping distance will be
A
60 m
B
40 m
C
20 m
D
80 m
3
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
4
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
$$\sqrt {{\alpha ^2} + {\beta ^2}}$$
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