Q.1
If two balls of same density but different masses are dropped from a highest of 100 then:
  • a) both will come together on earth
  • b) both will come late on the earth
  • c) first will come first and second will after that
  • d) second will come first and first after
Q.2
A body starts from rest and move with constant acceleration. ThE ratio of distance covered by the body in nth second to that covered in n second is
  • a)1 : n
  • b) (2n-1)/ n2
  • c)n2 / (2n-1)
  • d)(2n-1) / 2n2
Q.3
Drops of water fall from the roof of the building 9m heigh at regular intervals of time, the first drop reaching the groung at the instant fourth drop starts to fall. What are the distances of the second and third drop from the roof
  • a) 6 m and 2 m
  • b)4 m and 1 m
  • c)6 m and 3 m
  • d)4 m and 2 m
Q.4
A car runs at constant speed on a circular track of radius 100m taking 62.8 sec on each lap. What is the average speed and average velocity on each complete lap
  • a) velocity 10 m/sec, speed 10m/sec
  • b) velocity zero, speed 10 m/sec
  • c)velocity zero and speed zero
  • d)velocity 10m/s, speed zero
Q.5
If x denotes displacement in time t and x=a cos t, then acceleration is
  • a) acost
  • b) -acost
  • c) -asint
  • d) asint
Q.6
Drops of water fall from the roof of a building 9 m heigh at regular intervals of time, the first drop reaching the ground at the same intervals of time, the first drop reaching the ground at the same instant fourth drop starts its fall. What are the distances of the second and third drops from the roof?
  • a)4 m and 2m
  • b) 6m and 3 m
  • c)4 m and 1 m
  • d)6 m and 2 m
Q.7
A car covers the first half distance at 40 km/hr and second half distance at 60km/hr along a straight road. The average speed is
  • a) 60km/hr
  • b) 52 km/hr
  • c)50 km/hr
  • d)48 km/hr
Q.8
A body moving with uniform acceleration has velocities of 30 m/sec and 40 m/sec when passing points P and Q in its path. What is the velocity midway between P and Q
  • a) 34.36 m/sec
  • b) 35.35m/sec
  • c)38.72 m/sec
  • d)35.0 m/sec
Q.9
With what speed must a ball be thrown down for it to bounce 10m higher than its original level? Neglect any loss of energy in striking the ground
  • a) 14 m/sec
  • b) 20 m/sec
  • c) 5 m/sec
  • d) none
Q.10
On a clam day a boat can go across a lake and returned in time To at a speed V. On a rough day there is uniform current speed v to help the onward journey and impede the return journey. If the time taken to go across and return on the rough day be T, then T/To is
  • a)
    ch-2_qn-189choice_img_no1.png
  • b)
    ch-2_qn-189choice_img_no2.png
  • c)
    ch-2_qn-189choice_img_no3.png
  • d)
    ch-2_qn-189choice_img_no4.png
Q.11
A particle moves in the x-y plane according to the law x=kt, y=kt( 1 -αt) where k and α are positive constants and t is time. The trajectory of the particle is
  • a) y=kx
  • b) y=x - (αx2)/k
  • c)y=-(αx2)/k
  • d)y=αx
Q.12
A particle moving with uniform acceleration is found to travel 35 m in 8th second and 51 m in the 12th second. Its velocity is m/s at the begining of 11th second is
  • a) 49
  • b) 45
  • c)47
  • d)51
Q.13
A rubber ball is dropped from a height of 5 metre on a plane, where the acceleration due to gravity is not known. On bouncing it rises to a height of 1.8 metre. The ball loses its velocity on bouncing by a factor of
  • a) 16/25
  • b) 2/5
  • c) 3/5
  • d) 9/25
Q.14
As shown in the figure a particle starts its motion from 0 to A. And then it moves from A to B. AB is an arc find the Path length
ch-2_que_no-193_img_no1.png
  • a)2r
  • b) r + π/3
  • c)r( 1+π/3)
  • d)π(r+1)/3
Q.15
In above problem Q193 What is displacement from A to B
  • a) r
  • b) r/2
  • c)πr/3
  • d)2r
Q.16
Here is a cube made from twelve wire each of length l. An ant goes from A to G through path A-B-C-G. Calculate the displacement.
ch-2_que_no-195_img_no1.png
  • a)3l
  • b) 2l
  • c)(√3)l
  • d)l/√3
Q.17
As shown in the figure particle P moves from A to B and particle Q moves from C to D. Displacements for P and Q are x and y respectively then
ch-2_que_no-196_img_no1.png
  • a) x > y
  • b) x < y
  • c) x=y
  • d) x ≥ y
Q.18
The graph of position Vs time shown in the figure for a particle is not possible because ...
ch-2_que_no-197_img_no1.png
  • a) velocity can not have two values on one time
  • b)Displacement can not have two values at one time
  • c)Acceleration can not have two values at one time
  • d)A, B and c are true
Q.19
An ant goes from P to R on a circular path in 20 second Radius OP=10m. What is the average speed and average velocity of it ?
ch-2_que_no-198_img_no1.png
  • a) (π/6) m/s, 3 m/s
  • b) (π/3) m/s, √3/2
  • c)(π/3) m/s,√3
  • d)π √6
Q.20
A car moving over a straight path covers a distance x with constant speed 10 m/s and then the same distance with constant speed of VIf average speed of the car is 16m/s, then V2=....
  • a) 30 m/s
  • b)20 m/s
  • c)40 m/s
  • d)25 m/s
Q.21
A car covers one third part of its straight path with speed V1 and the rest with speed VWhat is its average speed ?
  • a)
    ch-2_qn-201choice_img_no1.png
  • b)
    ch-2_qn-201choice_img_no2.png
  • c)
    ch-2_qn-201choice_img_no3.png
  • d)
    ch-2_qn-201choice_img_no4.png
Q.22
A particle moves 4m in the south direction. Then it moves 3m in the west direction. The time taken by the particle is 2 second. What is the ratio between average speed and average velocity
  • a) 5/7
  • b) 7/5
  • c)14/5
  • d)5/14
Q.23
A particle is projected vertically upwards with velocity 30ms–Find the ratio of average speeda nd instantaneous velocity after 6s. [g=10m/s2]
  • a)2
  • b)1/2
  • c)3
  • d)4
Q.24
Given figure shows a graph at acceleration → time for a rectilinear motion. Find average acceleration in first 10 seconds
ch-2_que_no-204_img_no1.png
  • a) 10 m/s2
  • b) 15 m/s2
  • c) 7.5 m/s2
  • d) 30 m/s2
Q.25
A body is moving in x direction with constant acceleration α . Find the difference of the displacement covered by it in nth second and (n–1)th second
  • a)α
  • b)α/2
  • c)3α
  • d)3α/2
Q.26
A freely falling particle covers a building of 45m height in one second. Find the height of the point from where the particle was released. [g=10ms–2]
  • a) 120m
  • b) 125m
  • c)25m
  • d)80m
Q.27
The distance travelled by a particle is given by s=3 + 2t + 5t2 The initial velocity of the particle is ...
  • a) 2 unit
  • b) 3 unit
  • c)10 unit
  • d) 5 unit
Q.28
A particle is thrown in upward direction with Velocity Vo. It passes through a point p of height h at time t1 and t2 so t1 + t2=....
  • a) vo / g
  • b) 2vo / g
  • c) 2h / g
  • d) h / 2g
Q.29
Ball A is thrown in upward from the top of a tower of height h. At the same time ball B starts to fall from that point. When A comes to the top of the tower, B reaches the ground. Find the the time to reach maximum height for A.
  • a)
    ch-2_qn-209choice_img_no1.png
  • b)
    ch-2_qn-209choice_img_no2.png
  • c)
    ch-2_qn-209choice_img_no3.png
  • d)
    ch-2_qn-209choice_img_no4.png
Q.30
In the figure Velocity (V) → position graph is given. Find the true equation.
ch-2_que_no-210_img_no1.png
  • a)
    ch-2_qn-210choice_img_no1.png
  • b)
    ch-2_qn-210choice_img_no2.png
  • c)
    ch-2_qn-210choice_img_no3.png
  • d)
    ch-2_qn-210choice_img_no4.png
0 h : 0 m : 1 s