JEE Questions for Physics Motion In A Straight Line Quiz 8 - MCQExams.com

A particle is thrown vertically upwards. If its velocity at half of the maximum height is 10 m/s, then maximum height attained by it is (Take g = 10 m/s2)
  • 8m
  • 10m
  • 12m
  • 16m
Three different objects of masses m1, m2 and m3 are allowed to fall from rest and from the same point \'O\' along three different frictionless paths. The speeds of the three objects. on reaching the ground, will be in theratio of

  • Physics-Motion in a Straight Line-81694.png
  • 2)
    Physics-Motion in a Straight Line-81695.png
  • 1 : 1 : 1

  • Physics-Motion in a Straight Line-81696.png
From the top of a tower, a particle is thrown vertically downwards with a velocity of 10 m/s. The ratio of the distances, covered by it in the 3rd and 2nd seconds of the motion is (Take g = 10 m/s2)
  • 5 : 7
  • 7 : 5
  • 3 : 6
  • 6 : 3
Two balls A and B of same masses are thrown from the top of the building. A, thrown upward with velocity V and B, thrown downward with velocity V, then
  • Velocity of A is more than B at the ground
  • Velocity of B is more than A at the ground
  • Both A & B strike the ground with same velocity
  • None of these
A cricket ball is thrown up with a speed of 19.6 ms–1. The maximum height it can reach is
  • 9.8 m
  • 19.6 m
  • 29.4 m
  • 39.2 m
A body falling from a high Minaret travels 40 m in the last 2 seconds of its fall to ground. Height of Minaret in meters is (take g = 10 m/s2)
  • 60
  • 45
  • 80
  • 50
A body falls from a height h = 200 m (at New Delhi). The ratio of distance travelled in each 2 sec during t = 0 to t = 6 second of the journey is
  • 1 : 4 : 9
  • 1 : 2 : 4
  • 1 : 3 : 5
  • 1 : 2 : 3
A man drops a ball downside from the roof of a tower of height 400 m.At the same time another ball is thrown upside they will meet at which height from the surface of the tower
  • 100 m
  • 320 m
  • 80 m
  • 240 m
Two balls are dropped from heights h and 2h respectively from the earth surface. The ratio of time of these balls to reach the earth is

  • Physics-Motion in a Straight Line-81704.png
  • 2)
    Physics-Motion in a Straight Line-81705.png
  • 2 : 1
  • 1 : 4
The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2 m on the surface of A. What is the height of jump by the same person on the planet B
  • 18 m
  • 6 m

  • Physics-Motion in a Straight Line-81707.png

  • Physics-Motion in a Straight Line-81708.png
If a body is thrown up with the velocity of 15 m/s then maximum height attained by the body is (g = 10 m/s2)
  • 11.25 m
  • 16.2 m
  • 24.5 m
  • 7.62 m
A packet is dropped from a balloon which is going upwards with the velocity 12 m/s, the velocity of the packet after 2 seconds will be
  • –12 m/s
  • 12 m/s
  • –7.6 m/s
  • 7.6 m/s
If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three second, the time of the travel is
  • 6 sec
  • 5 sec
  • 4 sec
  • 3 sec
The effective acceleration of a body, when thrown upwards with acceleration a will be

  • Physics-Motion in a Straight Line-81713.png
  • 2)
    Physics-Motion in a Straight Line-81714.png

  • Physics-Motion in a Straight Line-81715.png

  • Physics-Motion in a Straight Line-81716.png
A ball is dropped from a high rise platform at t = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed v. The two balls meet at t = 18s. What is the value of v. (take g = 10 m/s2)
  • 60 m/s
  • 75 m/s
  • 55 m/s
  • 40 m/s
A ball is thrown up under gravity (g = 10 m/sec2). Find its velocity after 1.0 sec at a height of 10 m
  • 5 m/sec2
  • 5 m/sec
  • 10 m/sec
  • 15 m/sec
Two stones of equal masses are dropped from a rooftop of height h one after another. Their separation distanceagainst time will
  • Remain the same
  • Increase
  • Decrease
  • Be zero
At t = 0, a stone of mass 10 gm is thrown straight up from the ground level with a speed 10 m/s. After 1 s, a second stone of the same mass is thrown from the same position with a speed 20 m/s. What is the position of the first stone from the ground level at the moment?(Take g = 10 m/s2)
  • 10 m
  • 1 m
  • 2 m
  • 5 m
The ratios of the distances traversed, in successive intervals of time by a body, falling from rest, are
  • 1 : 3 : 5 : 7 : 9 : …
  • 2 : 4 : 6 : 8 : 10 : ...
  • 1 : 4 : 7 : 10 : 13 : …
  • None of these
A body A is thrown up vertically from the ground with a velocity V0 and another body B is simultaneously dropped from a height H. They meet at a height H /2 if V0is equal to

  • Physics-Motion in a Straight Line-81722.png
  • 2)
    Physics-Motion in a Straight Line-81723.png

  • Physics-Motion in a Straight Line-81724.png

  • Physics-Motion in a Straight Line-81725.png
A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 ms–2, the velocity withwhich it hits the ground is
  • 5.0 m/s
  • 10.0 m/s
  • 20.0 m/s
  • 40.0 m/s
A stone falls freely from rest from a height h and it travels a distance 9h /25 in the last second. The value of h is 25
  • 145 m
  • 100 m
  • 122.5 m
  • 200 m
  • 175 m
The acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity v0. The distance travelled by the particle in time t will be

  • Physics-Motion in a Straight Line-81729.png
  • 2)
    Physics-Motion in a Straight Line-81730.png

  • Physics-Motion in a Straight Line-81731.png

  • Physics-Motion in a Straight Line-81732.png
A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

  • Physics-Motion in a Straight Line-81734.png
  • 2)
    Physics-Motion in a Straight Line-81735.png

  • Physics-Motion in a Straight Line-81736.png

  • Physics-Motion in a Straight Line-81737.png
A particle is dropped vertically from rest from a height. The time taken by it to fall through successive distancesof 1 m each will then be

  • Physics-Motion in a Straight Line-81739.png
  • In the ratio of the square roots of the integers 1, 2, 3...

  • Physics-Motion in a Straight Line-81740.png

  • Physics-Motion in a Straight Line-81741.png
A man throws balls with the same speed vertically upwards 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 (Given g = 9.8 m/s2)
  • At least 0.8 m/s
  • Any speed less than 19.6 m/s
  • Only with speed 19.6 m/s
  • More than 19.6 m/s
If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascentis

  • Physics-Motion in a Straight Line-81744.png
  • 2)
    Physics-Motion in a Straight Line-81745.png

  • Physics-Motion in a Straight Line-81746.png

  • Physics-Motion in a Straight Line-81747.png
A point initially at rest moves along x–axis. Its acceleration varies with time as a = (6t +m/s2. If its starts from origin, the distance covered in 2 s is
  • 20 m
  • 18 m
  • 16 m
  • 25 m
The displacement of a particle as a function of time is shown in the figure. The figure shows that
Physics-Motion in a Straight Line-81750.png
  • The particle starts with certain velocity but the motion is retarded and finally the particle stops
  • The velocity of the particle is constant throughout
  • The acceleration of the particle is constant throughout
  • The particle starts with constant velocity, then motion is accelerated and finally the particle moves with another constant velocity
The graph between the displacement x and time t for a particle moving in straight line is shown in figure. During the interval OA, AB, BC and CD, the acceleration of the particle is
Physics-Motion in a Straight Line-81751.png
  • (a)
  • (b)
  • (c)
  • (d)
0:0:1


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