Q.1.
If a ball is thrown vertically upwards with speed of 'u', the distance covered during the last 't' second of its ascent is .. [ CBSE-PMT 2003]
-
8%
a)( u+gt) t
-
17%
b) ut
-
42%
c)½gt2
-
33%
d)ut - ½ gt2
Q.2.
The water drops fall at regular intervals from a tap 5m above the ground. The third drop is leaving the tap at an instant when the first drop touches the ground. How far above the ground is the second drop at that instant? take g=10 m/s2 [ CBSE-PMT 1995]
-
12%
a)1.25 m
-
75%
b) 2.5 m
-
0%
c)3.75 m
-
12%
d)5.0 m
Q.3.
If a ball is thrown vertically upwards with velocity of 40m/s, then velocity of the ball after two seconds will be ( g=10 m/s2) [ CBSE-PMT 1996]
-
0%
a) 15 m/s
-
71%
b) 20 m/s
-
14%
c) 25 m/s
-
14%
d) 28 m/s
Q.4.
A ball is thrown vertically upward. It has a speed of 10 m/s when it has reached one half of its maximum height. How high does the ball rise? take g=10 ms2[ CBSE-PMT 2005]
-
50%
a)10 m
-
38%
b) 5 m
-
0%
c)15 m
-
12%
d)20m
Q.5.
A man throws balls with the same speed vertically upward one after the other at an interval of 2 seconds. what should be the speed of the throw so that more than two balls are in the sky at any time? g=m/s2
-
17%
a) only with speed 1.6 m/s
-
50%
b) more than 19.6 m/s
-
33%
c)At least 9.8 m/s
-
0%
d)Any speed less than 19.6 m/s
Q.6.
A bus travells between two points A ans B. V1 and V2 are it average speed and average velocity then
-
17%
a) v1 > v2
-
17%
b) v1 < v2
-
17%
c) v1=v2
-
50%
d) depends on situation
Q.7.
Two bodies A of mass 1 kg and B of mass 3 kg, are dropped from heights of 16 m and 25 m respectively. The ratio of the time taken by them to reach the ground is .. [ CBSE-PMT 2006]
-
17%
a) 12/5
-
0%
b) 5/12
-
83%
c)4/5
-
0%
d)5/4
Explanation
Q.8.
A body is thrown vertically upward from the ground. It reaches a maximum height of 20 m in 5 sec. After what time, it will reach the the ground from its maximum height position? [ CBSE - PMT 1995]
-
14%
a) 2.5 sec
-
43%
b) 5 sec
-
29%
c) 10 sec
-
14%
d) 25 sec
Q.9.
A stone is released with zero velocity from the top of a tower, reaches the ground in 4 sec. The height of the tower is ( g=10 m / s2)
-
0%
a)20 m
-
33%
b) 40 m
-
67%
c)80 m
-
0%
d)160 m
Q.10.
The displacement of a particle is represented by the following equations=3t3 + 7t2 + 5t + 8s is in meters and t in second. The acceleration of particle at t=1 s is [CBSE-PMT 2000]
-
17%
a) 14 m/s2
-
0%
b) 18 m/s2
-
67%
c)32 m/s2
-
17%
d)zero
Q.11.
The displacement of a particle varies with time(t) as s=at2 - btThe acceleration of the particle is zero at time ...[ CBSE-PMT 1997]
-
0%
a) a/b
-
60%
b) a/(3b)
-
20%
c)(3b)/ a
-
20%
d)(2a) / (3b)
Q.12.
If a car rest accelerates uniformly to speed of 144km/h in 20s, it covers a distance of ... [ CBSE-pmt 1997]
-
60%
a) 2880 m
-
20%
b) 1440 m
-
20%
c) 400 m
-
0%
d) 20 m
Explanation
Q.13.
The displacement x of a particle varies with time t as x=ae-αt + beβt, where a, b, α and β are positive constants. The velocity of the particle will .. [ CBSE-PMT 2005]
-
20%
a)be independent of α and β
-
40%
b) drop to zero when α=β
-
0%
c)go on decreasing with time
-
40%
d)go on increasing with time
Q.14.
A particle moves along a straight line OX. At time t(in seconds) the distance x(in meters) of the particle from O is given by x=40 + 12t - tHow long would the particle travel before coming to rest? [ CBSE-PMT 2006]
-
25%
a) 40 m
-
75%
b) 56 m
-
0%
c)16 m
-
0%
d)24 m
Q.15.
The position of a particle with respect to time t along x-axis is given by x=9t2 - t3, where x is in meters and t in second. What will be the position of this particle when it achieve maximum speed along the + ve X direction? [ CBSE-PMT 2007]
-
33%
a)54 m
-
17%
b)81 m
-
50%
c)24 m
-
0%
d)32 m
Q.16.
A particle moving along x-axis has acceleration f, at time given by fo and T are constant. The particle at t = 0 has zero velocity. In the time interval between t = 0 and the instant when f = 0 , the particle’s velocity (vx ) is [ CBSE - PMT 2007]
-
25%
a) ½ foT2
-
25%
b) foT2
-
25%
c) ½ foT
-
25%
d) foT
Explanation
Q.17.
the distance traveled by a particle starting from rest and moving with an acceleration (4/3) m/s2 in the third second is .. [ CBSE-PMT 2008]
-
0%
a)6 m
-
0%
b) 4 m
-
75%
c)(10/3)m
-
25%
d)(19/3) m
Explanation
Q.18.
The displacement time graph of moving particle is shown belowThe instantaneous velocity of the particle is negative at the point... [ CBSE-PMT 1994]
-
40%
a) D
-
0%
b) F
-
0%
c)C
-
60%
d)E
Q.19.
A car moves a distance of 200m. it covers the first half of the distance at speed 40 km/h and the second half of distance at speed v. The average speed is 48 km/h. find the value of v. [ CBSE-PMT 1991]
-
25%
a)56 km/h
-
25%
b) 60 km/h
-
50%
c)50 km/h
-
0%
d)48 km/h
Explanation
Q.20.
A body dropped from top of a tower falls through 40m during the last two seconds of its fall. The height of tower is ( g=10 m/s2) [ CBSE-PMT 1991]
-
0%
a) 60 m
-
33%
b) 45 m
-
33%
c) 80 m
-
33%
d) 50 m
Explanation
Q.21.
Which one of the following equation represents the motion of a body moving with constant finite acceleration? in these equation, y denotes the displacement in time t and p, q. and r are constant... [ CBSE-PMT 2011]
-
50%
a)y=(p+qt)(t+pt)
-
0%
b) y=p + t/r
-
25%
c)y=(p+t)(q+t)(r+t)
-
25%
d)y=(p+qt) / rt
Q.22.
the slope of the velocity time graph for retarded motion is .. [ CBSE-PMt 2007]
-
0%
a) positive
-
60%
b) negative
-
20%
c)zero
-
20%
d)can be +ve , -ve or zero
Q.23.
A train A which is 120 m long is running with velocity 20 m/s while train B which is 130 m long is running in opposite direction with velocity 30 m/s. What is the time taken by train B to cross the train A? [ CBSE-PMT 2009]
-
17%
a) 5 sec
-
50%
b) 25 sec
-
17%
c)10 sec
-
17%
d)100 sec
Q.24.
The driver of a car traveling at velocity 'v' suddenly sees a broad wall in front of him at a distance d. He should.. [ CBSE-PMT 2007]
-
40%
a) brake sharply
-
20%
b) turn sharply
-
20%
c) (a) and (b) both
-
20%
d) none of the above
Q.25.
Choose the wrong option
-
0%
a)Speed can never be negative
-
20%
b) When particle returns to the starting point, its average velocity is zero but average speed is not zero
-
40%
c)Displacement does not tell the nature of the actual motion of the particle
-
40%
d)If the velocity of a particle is zero at an instant, its acceleration should also be zero at that instant
Q.26.
A car is moving on a road and rain is falling vertically, then, select the correct option
-
40%
a) The rain will strike the hind screen only
-
40%
b) The rain will strike the front screen only
-
0%
c)The rain will strike the both screen only
-
20%
d)The rain will not strike both the screen
Explanation
Q.27.
A bus traveled the first one third distance at the speed of 10km/hr, the next one third distance at 20km/hr and the last one third at 60km/hr. The average speed of the bus is
-
50%
a) 18 km/hr
-
0%
b) 16 km/hr
-
0%
c)9 km/hr
-
50%
d)48 km/hr
Q.28.
A body is released from the top of the tower H meter high. It takes t seconds to reach the ground. Where is the body t/2 seconds after release
-
0%
a) At H/2 meters from ground
-
40%
b) At H/4 meters from ground
-
60%
c) At 3H/4 meters from ground
-
0%
d) At H/6 meters from the ground
Q.29.
A body is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to .. [ BHU 1995]
-
0%
a)t1/2
-
0%
b) t3/4
-
100%
c)t3/2
-
0%
d)t2
Q.30.
If 'a', 'b' and 'c' be the distances traveled by the body during xth ,yth , zth second from start, then which of the following relations is true
-
0%
a) a(y-z) + b(z-x)+ c(x-y)=0
-
50%
b) a(x-y)+b(y-z)+c(z-x)=0
-
17%
c)a(z-x)+b(x-y)+c(y-z)=0
-
33%
d)ax+by+cz=0