JEE Questions for Physics Motion In A Straight Line Quiz 11 - MCQExams.com

A balloon rises from rest with a constant acceleration g/8. A stone is released from it when it has risen to height h. The time taken by the stone to reach theground is

  • Physics-Motion in a Straight Line-81858.png
  • 2)
    Physics-Motion in a Straight Line-81859.png

  • Physics-Motion in a Straight Line-81860.png

  • Physics-Motion in a Straight Line-81861.png
Two bodies are thrown simultaneously from a towerwith same initial velocity v0 : one vertically upwards,the other vertically downwards. The distance betweenthe two bodies after time t is

  • Physics-Motion in a Straight Line-81863.png
  • 2)
    Physics-Motion in a Straight Line-81864.png

  • Physics-Motion in a Straight Line-81865.png

  • Physics-Motion in a Straight Line-81866.png
An aeroplane files around a square field ABCD of each side 1000 km. Its speed along AB is 250 km h–1, along BC 500 km h–1, along CD 200 km h–1, and along DA 100 km h–1. Its average speed (in km h–1) over the entire trip is
  • 225.5
  • 175.5
  • 190.5
  • 310.5
A body moves 6 m north, 8 m east and 10 m vertically upwards, what is its resultant displacement from initial position?

  • Physics-Motion in a Straight Line-81869.png
  • 10 m

  • Physics-Motion in a Straight Line-81870.png

  • Physics-Motion in a Straight Line-81871.png
A person moves 30 m north and then 20 m towards east and finally 30√2 m in southwest direction. The displacement of the person from the origin will be
  • 10 m along north
  • 10 m long south
  • 10 m along west
  • Zero
A wheel of radius 1 m rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is

  • Physics-Motion in a Straight Line-81874.png
  • 2)
    Physics-Motion in a Straight Line-81875.png

  • Physics-Motion in a Straight Line-81876.png

  • Physics-Motion in a Straight Line-81877.png
A cyclist starts from the centre O of a circular park of radius one kilometre, reaches the edge P of the park, then cycles along the circumferences and returns to the centre along QO as shown in the figure. If the round trip takes ten minutes, the net displacement and average speed of the cyclist (in metre and kilometre per hour) is
Physics-Motion in a Straight Line-81879.png
  • 0, 1
  • 2)
    Physics-Motion in a Straight Line-81880.png

  • Physics-Motion in a Straight Line-81881.png
  • 0, 21.4
The displacement of a body along x-axis depends on time as √x = t + 1. Then, the velocity of body
  • Increase with time
  • Decreases with time
  • Independent of time
  • None of these
A body is moving along a straight line path with constant velocity. At an instant of time the distance travelled by it is S and its displacement is D, then
  • D < S
  • D > S
  • D = S
  • D ≤ S
The displacement-time graph for two particles A and B are straight lines inclined at angles of 30o and 60o with the time axis. The ratio of velocities of VA : VB is
  • 1 : 2
  • 1 : √3
  • √3 : 1
  • 1 : 3
A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms–1. Assuming constant acceleration, the approximate time that it spends in the barrel after the gun is fired is
  • 4 ms
  • 40 ms
  • 400 μs
  • 1 ms
A boy walks to his school at a distance of 6 km with constant speed of 2.5 km/hour and walks back with a constant speed of 4 km/hr. His average speed for round trip expressed in km/hour, is
  • 24/13
  • 40/13
  • 3
  • 1/2
A particle moves along a semicircle of radius 10 m in 5 sec. The average velocity of the particle is

  • Physics-Motion in a Straight Line-81888.png
  • 2)
    Physics-Motion in a Straight Line-81889.png

  • Physics-Motion in a Straight Line-81890.png

  • Physics-Motion in a Straight Line-81891.png
The ratio of the numerical values of the average velocity and average speed of a body is always
  • Unity
  • Unity of less
  • Unity or more
  • Less than unity
A person travels along a straight road for the first half time with a velocity v1 and the next time with a velocity v2. The mean velocity V of the man is

  • Physics-Motion in a Straight Line-81894.png
  • 2)
    Physics-Motion in a Straight Line-81895.png

  • Physics-Motion in a Straight Line-81896.png

  • Physics-Motion in a Straight Line-81897.png
Which of the following options is correct for the object having a straight line motion represented by the following graph?
Physics-Motion in a Straight Line-81898.png
  • The object moves with constantly increasing velocity from O to A and then it moves with constant velocity
  • Velocity of the object increases uniformly
  • Average velocity is zero
  • The graph shown in impossible
The numerical ratio of displacement to the distance covered is always
  • Equal than one
  • Less than one
  • Equal to or less than one
  • Equal to or greater than one
A particle moves for 20 sec with velocity 3 m/s and then velocity 4 m/s for another 20 sec and finally moves with velocity 5 m/s for next 20 sec. What is the average velocity of the particle?
  • 3 m/s
  • 4 m/s
  • 5 m/s
  • Zero
The correct statement from the following is
  • A body having zero velocity will not necessarily have zero acceleartion
  • A body having zero velocity will necessarily have zero acceleration
  • A bosy having uniform speed can have only uniform acceleartion
  • A body having non-uniform velocity will have zero acceleration
A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion?
  • 1.5 cm
  • 1.0 cm
  • 3.0 cm
  • 2.0 cm
A car moves a distance of 200 m. It covers first half of the distance at speed 60 kmh–1 and the second half at speed v. If the average speed is 40 kmh–1, the value of v is
  • 30 kmh–1
  • 13 kmh–1
  • 60 kmh–1
  • 40 kmh–1
A bus begins to move with an acceleration of 1 ms–2. A man who is 48 m behind the bus starts running at 10 ms–1 to catch the bus. The man will be able to catch the bus after
  • 6s
  • 5s
  • 3s
  • 8s
A particle starts from rest at t = 0 and moves in a straight line with an acceleration as shown below. The velocity of the particle at t = 3 s is
Physics-Motion in a Straight Line-81903.png
  • 2 ms–1
  • 4 ms–1
  • 6 ms–1
  • 8 ms–1
The acceleration a of a particle starting from rest varies with time according to relation a = αt + β. The velocity of the particle after a time t will be

  • Physics-Motion in a Straight Line-81905.png
  • 2)
    Physics-Motion in a Straight Line-81906.png

  • Physics-Motion in a Straight Line-81907.png

  • Physics-Motion in a Straight Line-81908.png
The relation between time and distance is t = αx2 + βx, where α and β are constants. The retardation is

  • Physics-Motion in a Straight Line-81910.png
  • 2)
    Physics-Motion in a Straight Line-81911.png

  • Physics-Motion in a Straight Line-81912.png

  • Physics-Motion in a Straight Line-81913.png
A body starting from rest moves with constant acceleration. The ratio of distance covered by the body during the 5th sec to that covered in 5 sec is
  • 9/25
  • 3/5
  • 25/9
  • 1/25
A particle moves along x-axis is
x = 4(t –+ a(t – 2)2
Which of the following is true?
  • The initial velocity of particle is 4
  • The acceleration of particle is 2a
  • The particle is at origin at t = 0
  • None of the above
A man is 45 m behind the bus when the bus start accelerating from rest with acceleration 2.5 m/s2. With what minimum velocity should the man start running to catch the bus?
  • 12 m/s
  • 14 m/s
  • 15 m/s
  • 16 m/s
The velocity of a body depends on time according to the equation v = 20 + 0.1t2. The body is undergoing
  • Uniform acceleration
  • Uniform retardation
  • Non-uniform acceleration
  • Zero acceleration
Which of the following four statements is false?
  • A body can have zero velocity and still be accelerated
  • A body can have a constant velocity and still have a varying speed
  • A body can have a constant speed and still have a varying velocity
  • The direction of the velocity of a body can change when its acceleration i s constant
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Physics Quiz Questions and Answers