JEE Questions for Physics Motion In A Straight Line Quiz 17 - MCQExams.com

A body falls freely from the top of a tower. If covers 36% of the total height in the last second before striking the ground level. The height of the tower is
  • 50 m
  • 75 m
  • 100 m
  • 125 m
A thief is running away on a straight road in jeep moving with a speed of 9 ms. A police man chases him on a motorcyde moving at a speed of 10 ms-1. If the instantaneous separation of the jeep from the motorcycle is 100 m, how long will it take for the police to catch the thief?
  • 100 s
  • 1 s
  • 19 s
  • 90 s
A car A is travelling on a straight level road with a uniform speed of 60 km/hr. It is followed by another car B which is moving with a speed 0170 km/hr. When the distance between them is 2.5 km. the car B is given a deceleration of 20 km/hr2. After how much time will B catch up with A?
  • 1 hr
  • 1/2 hr
  • 1/4 hr
  • 1/8 hr
The speed of a body moving with uniform acceleration is u. This speed is doubled while covering a distance S. When it covers an additional distance S, its speed would become
  • √3 u
  • √5 u
  • √11 u
  • √7 u
Two trains one of length 100 m and another of length 125 m, are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10 m/s. If their acceleration are 0.3 m/s2 and 0.2 m/s2 respectively, then the time they take to pass each other will be
  • 5 s
  • 10 s
  • 15 s
  • 20 s
A body starts from rest with uniform acceleration. If its velocity after n second is p. then its displacement in the last two seconds is

  • Physics-Motion in a Straight Line-82182.png
  • 2)
    Physics-Motion in a Straight Line-82183.png

  • Physics-Motion in a Straight Line-82184.png

  • Physics-Motion in a Straight Line-82185.png
A point starts moving in a straight line with a certain acceleraLion. AL a time i after beginning of motion the acceleration suddenly becomes retardation of the same value. ‘the time in which the point returns to the initial point is

  • Physics-Motion in a Straight Line-82187.png
  • 2)
    Physics-Motion in a Straight Line-82188.png

  • Physics-Motion in a Straight Line-82189.png
  • cannot be predicted unless acceleration is given
A particle is moving in a straight line and passes through a point 0 with a velocity of 6 ms-1. The particle moves with a constant retardation of 2 ms for 4 s and there after moves with constant velocity. How long after leaving C) does the particle return to 0?
  • 3 s
  • 8 s
  • Never
  • 4 s
A bird flies for 4s with a velocity of |t — 2|m/s in a straight line, where r is time in seconds. It covers a distance of
  • 2 m
  • 4 m
  • 6 m
  • 8 m
A particle is projected with velocity u0 along x-axis.The deceleration on the particle is proportional to the square of the distance from the origin 1. e., a = — αx2. The distance at which the particle stops is

  • Physics-Motion in a Straight Line-82193.png
  • 2)
    Physics-Motion in a Straight Line-82194.png

  • Physics-Motion in a Straight Line-82195.png

  • Physics-Motion in a Straight Line-82196.png
A body is projectcd vertically up with a vclocity v and after some rime It returns to the point from which it was projected. The average velocity and average speed of the body for the total time of flight are

  • Physics-Motion in a Straight Line-82198.png
  • 2)
    Physics-Motion in a Straight Line-82199.png

  • Physics-Motion in a Straight Line-82200.png

  • Physics-Motion in a Straight Line-82201.png
A stone is dropped from a height h. Simultaneously, another stone is thrown up from the ground which reaches a height 4 h. The two stones cross each oilier after time

  • Physics-Motion in a Straight Line-82203.png
  • 2)
    Physics-Motion in a Straight Line-82204.png

  • Physics-Motion in a Straight Line-82205.png

  • Physics-Motion in a Straight Line-82206.png
Four marbles are dropped from the top of a tower one after the other with an interval of one second. The first one reaches the ground after 4 sec. When the first one reaches the ground the distances between the first and second, the second and third and the third and forth will be respectively.
  • 35, 2.5 and 15 m
  • 30, 20 and 10 m
  • 20, 10 and 5 m
  • 40, 30 and 20 m
0:0:1


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