JEE Questions for Physics Motion In A Plane Quiz 13 - MCQExams.com

A particle reaches its highest point when it has covered exactly one half of its horizontal range. The corresponding point on the displacement time graph is characterized by
  • Negative slope and zero curvature
  • Zero slope and negative curvature
  • Zero slope and positive curvature
  • Positive slope and zero curvature
At the top of the trajectory of a projectile, the acceleration is
  • Maximum
  • Minimum
  • Zero
  • g
When a body is thrown with a velocity u making an angle θ with the horizontal plane, the maximum distance by it in horizontal direction is

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  • 2)
    Physics-Motion in a Plane-80990.png

  • Physics-Motion in a Plane-80991.png

  • Physics-Motion in a Plane-80992.png

  • Physics-Motion in a Plane-80993.png
A body starts from rest from the origin with an acceleration of 6 m/s2 along the x-axis and 8 m/s2 along the y-axis. Its distance from the origin after 4 sec will be
  • 56 m
  • 64 m
  • 80 m
  • 128 m
A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of 30o with the horizontal. The change in momentum (in magnitude) of the body is
  • 24.5 N–s
  • 49.0 N–s
  • 98.0 N–s
  • 50.0 N–s

Physics-Motion in a Plane-80996.png
  • The acceleration of the particle is zero at t = 0 second
  • The velocity of the particle is zero at t = 0 second
  • The velocity of the particle is zero at t = 1 second
  • The velocity and acceleration of the particle are never zero
A gun is aimed at a tangent in a line of its barrel. The target is released and allowed to fall under gravity at the same instant the gun is fired. The bullet will
  • Pass above the target
  • Pass below the target
  • Hit the target
  • Certainly miss the target
If the range of a gun which fires a shell with muzzle speed V is R, then the angle of elevation of the gun is

  • Physics-Motion in a Plane-80998.png
  • 2)
    Physics-Motion in a Plane-80999.png

  • Physics-Motion in a Plane-81000.png

  • Physics-Motion in a Plane-81001.png
If time of flight of a projectile is 10 sec. range is 500 m. The maximum height attained by its will be
  • 125 m
  • 50 m
  • 100 m
  • 150 m
A bullet is fired from a cannon with velocity 500 m/s. If the angle of projection is 15o and g = 10 m/s2. Then the range is
  • 25 × 103 m
  • 12.5 × 103 m
  • 50 × 102 m
  • 25 × 102 m
A ball thrown by a boy is caught by another after 2 sec same distance away in the same level. If the angle of projection is 30o, the velocity of projection is
  • 19.6 m/s
  • 1.8 m/s
  • 14.7 m/s
  • None of these
A ball is thrown upwards at an angle of 60o to the horizontal. it falls on the ground at a distance of 90 m. If the ball is thrown with the same initial velocity at an angle 30o, it will fall on the ground at a distance of
  • 30 m
  • 60 m
  • 90 m
  • 120 m
Four bodies P, Q, R and S are projected with equal velocities angles of projection 15o, 30o, 45o and 60o with the horizontal respectively. The body having shortest range is
  • P
  • Q
  • R
  • S
An object is projected with a velocity of 20 m/s making an angle of 45o with horizontal. The equation for the trajectory is h = Ax – Bx2 where h is height, x is horizontal distance, A and are constants. The ratio A : B is (g = 10 ms–2)
  • 1 : 5
  • 5 : 1
  • 1 : 40
  • 40 : 1
Which of the following sets of factors will affect the horizontal distance covered by an athlete in a long-jump event?
  • Speed before he jumps and his weight
  • The direction in which he leaps and the initial speed
  • The force with which he pushes the ground and his speed
  • None of the above
In a projectile motion, velocity at maximum height is

  • Physics-Motion in a Plane-81008.png
  • 2)
    Physics-Motion in a Plane-81009.png

  • Physics-Motion in a Plane-81010.png
  • None of these
A body of mass m is thrown upwards at angle θ with the horizontal with velocity v. While rising up the velocity of the mass after t seconds will be

  • Physics-Motion in a Plane-81012.png
  • 2)
    Physics-Motion in a Plane-81013.png

  • Physics-Motion in a Plane-81014.png

  • Physics-Motion in a Plane-81015.png
A cricketer can throw a ball to a maximum horizontal distance of 100 m. With the same effort, he throws the ball vertically upwards. The maximum height attained by the ball is
  • 100 m
  • 80 m
  • 60 m
  • 50 m
Neglecting the air resistance, the time of flight of a projectile is determined by

  • Physics-Motion in a Plane-81018.png
  • 2)
    Physics-Motion in a Plane-81019.png

  • Physics-Motion in a Plane-81020.png

  • Physics-Motion in a Plane-81021.png
A ball is thrown from a point with a speed v0 at an angle of projection θ. From the same point and at the same instant a person starts running with a constant speed v0/2 to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection?
  • Yes, 60o
  • Yes, 30o
  • No
  • Yes, 45o
At what point of a projectile motion acceleration and velocity are perpendicular to each other?
  • At the point of projection
  • At the point of drop
  • At the topmost point
  • Any where in between the point of projection and topmost point
An object is projected at an angle of 45o with the horizontal range and maximum height reached will be in the ratio
  • 1 : 2
  • 2 : 1
  • 1 : 4
  • 4 : 1
A projectile is projected with a speed u making an angle 2θ with the horizontal. What is the speed when its direction of motion makes an angle θ with the horizontal

  • Physics-Motion in a Plane-81030.png
  • 2)
    Physics-Motion in a Plane-81031.png

  • Physics-Motion in a Plane-81032.png

  • Physics-Motion in a Plane-81033.png
Two bodies are projected from ground with equal speeds 20 m/sec from the same position in same vertical plane to have equal range but at different angle above the horizontal. If one of the angle is 30o the sum of their maximum heights is (assume g = 10 m/s2)
  • 400 m
  • 20 m
  • 30 m
  • 40 m
The coordinates of moving particle at any \'t\' are given by x = αt3 and y = βt3. The speed of the particle at time \'t\' is given by

  • Physics-Motion in a Plane-81036.png
  • 2)
    Physics-Motion in a Plane-81037.png

  • Physics-Motion in a Plane-81038.png

  • Physics-Motion in a Plane-81039.png
A ball is projected from the ground at a speed of 10 ms–1 making an angle of 30o with the horizontal. Another ball is simultaneously released from a point on the vertical line along the maximum height of the projectile. Both the balls collide at the maximum height of first ball. The initial height of the second ball is (g = 10 ms–2)
  • 6.25 m
  • 2.5 m
  • 3.75 m
  • 5 m
A projectile is projected with kinetic energy K. If it has the maximum possible horizontal range, then its kinetic energy at the highest point will be
  • 0.25 K
  • 0.5 K
  • 0.75 K
  • 1.0 K

Physics-Motion in a Plane-81043.png

  • Physics-Motion in a Plane-81044.png
  • 2)
    Physics-Motion in a Plane-81045.png

  • Physics-Motion in a Plane-81046.png

  • Physics-Motion in a Plane-81047.png
A body is projected with a speed u m/s at an angle β with the horizontal. The kinetic energy at the highest point is 3/4 th of the initial kinetic energy. The value of β is
  • 30o
  • 45o
  • 60o
  • 120o
An object is projected so that its horizontal range R is maximum. If the maximum height attained by the object is H, then the ratio of R/H is
  • 4
  • 1/4
  • 2
  • 1/2
0:0:1


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