Q.1.
The velocity -time graph of a body moving with uniform velocity is straight line
-
0%
a) parallel to y-axis
-
80%
b) parallel to x-axis
-
20%
c)inclined to x-axis
-
0%
d)inclined to y-axis
Q.2.
Two bodies are thrown vertically upwards with their initial speeds in ratio 2:3 then the ratio of the maximum heights attained by them is
-
20%
a) 2 : 3
-
60%
b) 4:9
-
0%
c)1:1
-
20%
d)√2 : √3
Q.3.
A ball released from a height falls 5m in one second. In 4 seconds it falls through
-
100%
a) 20 m
-
0%
b) 1.25 m
-
0%
c) 40 m
-
0%
d) 80 m
Q.4.
A particle is moving along a straight line path according to the relation S2=at2 + 2bt + c S represents the distance travelled in t seconds and a,b,c are constants. Then the acceleration of the particle varies as
-
20%
a)S-3
-
20%
b) S3/2
-
60%
c)S-2/3
-
0%
d)S2
Explanation
Q.5.
A body travelling with uniform acceleration crosses two points A and B with velocities 20 m/sec and 30 m/sec respectively. The speed of the body at mid point of A and B is
-
20%
a) 25 m/sec
-
80%
b) 25.5 m/sec
-
0%
c)24 m/sec
-
0%
d)10√6 m/sec
Q.6.
The speed of the car is v, the minimum distance over which it can be stopped is x. If the speed becomes nv, then minimum distance in which it can be stopped in same time is
-
20%
a) x/n
-
40%
b) nx
-
20%
c)x/n2
-
20%
d)n2 x
Q.7.
An iron sphere and wooden sphere of same mass are projected upwards in air of density ρ with a velocity v m/s. NEglecting the effect of viscosity.
-
20%
a) the maximum height attained by both of them is same
-
0%
b) iron sphere will rise higher
-
20%
c) wooden sphere will rise higher
-
60%
d) both will reach the same maximum height but they will take different times
Q.8.
The distance time graph of a particle at time t makes an angle of 45° with the time axis. A fter one second it makes an angle of 60° with the time axis. What is the acceleration of the particle
-
20%
a)√3 - 1
-
60%
b) √3 + 1
-
20%
c)√3
-
0%
d)1
Q.9.
The displacement of a particle is represented by then the acceleration of the particle will be
-
25%
d)none of the above
-
25%
a) a0
-
25%
b) a1/2
-
25%
c)2a2 / 3
Q.10.
A particle starting from rest travels a distance x in first 2 seconds and a distance y in next two seconds, then
-
0%
a) y=x
-
25%
b) y=2x
-
25%
c)y=3x
-
50%
d)y=4x
Q.11.
Two trains A and B, 100 km apart are travelling towards each other with starting speed of 50km/hr for both. The train A is accelerating at 18 km/hr2 and the train B is de-accelerating at 18 km/hrThe distance where the engines cross each other starting point of A is
-
20%
a) 50 km
-
40%
b) 68 km
-
40%
c) 32 km
-
0%
d) 59 km
Q.12.
A train of length 200 m travelling at 30 m/sec overtakes another train of length 300 m travelling at 20 m/sec. The time taken by the first train to pass the second is
-
33%
a)30 sec
-
0%
b) 50 sec
-
0%
c)10 sec
-
67%
d)40 sec
Q.13.
A stone is dropped from the top of the tower and travels 24.5 m in the last second of its journey, the height of the tower is
-
33%
a) 44.1 m
-
0%
b) 49.0 m
-
33%
c)78.4 m
-
33%
d)72.0 m
Q.14.
A stone falls freely under gravity. The total distance covered by it in the last second of journey equals the distance covered by it in first three seconds of its motion. The time for which the stone is in air is
-
0%
a) 5 sec
-
33%
b) 12 sec
-
67%
c)15 sec
-
0%
d)8 sec
Q.15.
A boy is throwing balls into the air, throwing one whenever the previous one is at its highest point. How high do the balls rise if he throws once a second
-
33%
a) 2.45 m
-
33%
b) 12.25 m
-
0%
c) 19.6 m
-
33%
d) 4.9
Q.16.
A balloon is moving upward with velocity 12/sec. It releases a stone when it is at a height of 65 m from the ground. The time taken by the stone to reach the ground. The time taken by the stone to reach the ground is
-
33%
a)√13 sec
-
0%
b) 5 sec
-
67%
c)6.5 sec
-
0%
d)13 sec
Q.17.
A body is released from great height and falls freely towards the earth. A another body is released from the same height exactly one second later. Then the separation between the two bodies two seconds after the release of the second body is
-
33%
a) 4.9 m
-
33%
b) 9.8 m
-
33%
c)19.6 m
-
0%
d)24.5 m
Q.18.
A stone is released with zero velocity from the top of tower and travels 24.5 m in last second of journey. The time for which the stone in air is ...
-
0%
a) 3 sec
-
75%
b) 9 sec
-
25%
c)1 sec
-
0%
d)5 sec
Q.19.
Two balls of equal mass are thrown upwards along the same vertical direction at an interval of 2 second with the same initial velocity of 39.2 m/s. Then these collide at the height of
-
0%
a) 117.6 m
-
33%
b) 73.5 m
-
67%
c) 196.0 m
-
0%
d) 44.1 m
Q.20.
A bus starts from rest with an acceleration of 1m/sA man who is 48 m behind the bus starts with a uniform velocity of 10 m/sec then the minimum time after which the man will catch the bus is
-
0%
a)12 sec
-
33%
b) 8 sec
-
33%
c)10 sec
-
33%
d)4.8 sec
Q.21.
A body starts from rest and falls vertically from a height of 19.6 m. If g=9.8 m/s2, then the distance travelled by the body in the last 0.1 second if its motion is
-
0%
a) 0.049 m
-
100%
b) 1.9 m
-
0%
c)17.7 m
-
0%
d)19.6 m
Q.22.
A body is thrown vertically upwards in air. When air resistance is taken into consideration, let the time of ascent be t1 and the time of descent be tThen
-
33%
a)t1=t2
-
0%
b) t1
- 33%
c)t1 >t2- 33%
d)t1 ≤;t2Q.23.The speed of the car is reduced to one-third of its original value in travelling a distance S. Then, the car is brought to rest in a minimum distance-
0%
a) 9S
-
33%
b) (8/9) S
-
67%
c) (9/8) S
-
0%
d) 3 S
Explanation
Q.24.Two particles A and B get 4m closer each second while travelling in opposite direction. They get 0.4 m closer every second while travelling in same direction. The speeds of A and B are respectively:-
33%
a)2.2 m/sec and 0.4 m/sec
-
33%
b) 2.2 m/sec and 1.8 m/sec
-
33%
c)4.0 m/sec and 0.4 m/sec
-
0%
d)none of above
Q.25.An insect crawls a distance of 4m along north in 10 seconds and then a distance 3m along east in 5 seconds. The average velocity of insect is-
0%
a) 7/15 m/sec
-
0%
b) 1/5 m/sec
-
33%
c)5/15 m/sec
-
67%
d)12/15 m/s
Q.26.A body thrown up with a finite speed is caught back after 4 sec. The speed of the body with which it is thrown up is-
0%
a) 10 m/sec
-
0%
b) 20 m/sec
-
67%
c)30 m/sec
-
33%
d)40 m/sec
Q.27.A balloon is moving upwards with velocity 9.8 m/sec. It releases a stone which comes down to the ground in 11 sec. The height of the balloon from the ground at the moment when the stone was dropped is-
0%
a) 492.9 m
-
67%
b) 490 m
-
33%
c) 485.1 m
-
0%
d) 494.5 m
Q.28.A stone is dropped into a well in which the level of water is h below the top of the well. If v is he velocity of sound, the time T after which the splash is heard is given by-
0%
a)T=2h/v
-
100%
b)
-
0%
c)
-
0%
d)
Q.29.An elevator in which man is standing is moving upwards with speed of 10m/sec. If the man drops a coin from a height of 2.45 m, it reaches the floor of the elevator after a times ( g=9.8 m/sec2)-
0%
a) √2
-
33%
b) 1/√2 sec
-
33%
c)2 sec
-
33%
d)1/2 sec
Q.30.A body sliding on a smooth inclined plane requires 4 seconds to reach the bottom starting from rest at the top. How much time does it take to cover one fourth the distance starting from the rest at the top-
0%
a)1 seconds
-
33%
b) 2 seconds
-
67%
c)4 seconds
-
0%
d)16 seconds
- 33%
