1
AIEEE 2005
+4
-1
A car starting from rest accelerates at the rate f through a distance S, then continues at constant speed for time t and then decelerates at the rate $${f \over 2}$$ to come to rest. If the total distance traversed is 15 S, then
A
$$S = {1 \over 6}f{t^2}$$
B
$$S = ft$$
C
$$S = {1 \over 4}f{t^2}$$
D
$$S = {1 \over 72}f{t^2}$$
2
AIEEE 2005
+4
-1
The relation between time t and distance x is t = ax2 + bx where a and b are constants. The acceleration is
A
2bv3
B
-2abv2
C
2av2
D
-2av3
3
AIEEE 2005
+4
-1
A particle is moving eastwards with a velocity of 5 m/s. In 10 seconds the velocity changes to 5 m/s northwards. The average acceleration in this time is
A
$${1 \over 2}m{s^{ - 2}}$$ towards north
B
$${1 \over {\sqrt 2 }}m{s^{ - 2}}$$ towards north-east
C
$${1 \over {\sqrt 2 }}m{s^{ - 2}}$$ towards north-west
D
zero
4
AIEEE 2005
+4
-1
A parachutist after bailing out falls $$50$$ $$m$$ without friction. When parachute opens, it decelerates at $$2\,\,m/{s^2}.$$ He reaches the ground with a speed of $$3$$ $$m/s$$. At what height, did he bail out?
A
$$182$$ $$m$$
B
$$91$$ $$m$$
C
$$111$$ $$m$$
D
$$293$$ $$m$$
EXAM MAP
Medical
NEET