JEE Questions for Physics Motion In A Plane Quiz 5 - MCQExams.com


Physics-Motion in a Plane-80491.png
  • 5
  • 6
  • 8
  • 9
A small sphere is hung by a string fixed to a wall. The sphere is pushed away from the wall by a stick. The forces acting on the sphere are shown in Fig. Which of the following statements is wrong?
Physics-Motion in a Plane-80493.png

  • Physics-Motion in a Plane-80494.png
  • 2)
    Physics-Motion in a Plane-80495.png

  • Physics-Motion in a Plane-80496.png

  • Physics-Motion in a Plane-80497.png
A sphere of mass m, moving with a speed v strikes a wall elastically at an angle of incidence θ. If the speed of the sphere before and after collision is the same and the angle of rebound is equal to the angle of incidence and velocity normally towards the wall is taken as negative, then the change in momentum parallel to the wall is :
  • 2 m v cos⁡ θ
  • –2 m v cos⁡ θ
  • zero
  • m v cos⁡ θ
The instantaneous co-ordinates of a particle are x = 6 t metre and y = 4 t2 metre. What will be the velocity of the particle at t = 1 s?
  • 10 m/s
  • 4 m/s
  • 2 m/s
  • 6 m/s

Physics-Motion in a Plane-80499.png
  • 45º with X axis
  • 180º with Y axis
  • Oº with Z-axis
  • 180º with Z-axis

Physics-Motion in a Plane-80501.png

  • Physics-Motion in a Plane-80502.png
  • 2)
    Physics-Motion in a Plane-80503.png

  • Physics-Motion in a Plane-80504.png

  • Physics-Motion in a Plane-80505.png

Physics-Motion in a Plane-80507.png

  • Physics-Motion in a Plane-80508.png
  • 2)
    Physics-Motion in a Plane-80509.png

  • Physics-Motion in a Plane-80510.png

  • Physics-Motion in a Plane-80511.png

Physics-Motion in a Plane-80513.png
  • 2
  • 3
  • 4
  • 5

Physics-Motion in a Plane-80515.png

  • Physics-Motion in a Plane-80516.png
  • 2)
    Physics-Motion in a Plane-80517.png

  • Physics-Motion in a Plane-80518.png
  • zero

Physics-Motion in a Plane-80520.png
  • 20
  • 23

  • Physics-Motion in a Plane-80521.png
  • 26

Physics-Motion in a Plane-80523.png
  • 60 units
  • 2)
    Physics-Motion in a Plane-80524.png
  • 7.5 units
  • zero

Physics-Motion in a Plane-80526.png
  • 0
  • 2)
    Physics-Motion in a Plane-80527.png

  • Physics-Motion in a Plane-80528.png

  • Physics-Motion in a Plane-80529.png

Physics-Motion in a Plane-80531.png

  • Physics-Motion in a Plane-80532.png
  • 5

  • Physics-Motion in a Plane-80533.png
  • 10
The range of a projectile fired at an angle of 15º is 50 m. If it is fired with the same speed at an angle of 45º. Its range will be
  • 25 m
  • 50 m
  • 100 m
  • 77.6
Two projectiles A and B are projected with angle of projection 30o for the projectile A and 45o for the projectile B. If RA and RB are the horizontal ranges for the two projectiles, then
  • RA = RB
  • RA >RB
  • RA < RB
  • the information is insufficient to decide the relation of RA and RB
A projectile is projected at an angle of 15º to the horizontal with some speed υ. If another projectile is projected with the same speed, then it must be projected at what angle with the horizontal so as to have the same range.
  • It is never possible
  • 12.5º
  • 75º
  • 65º
A man has two spheres A and B. He is standing at the top of a tower. He gently drops the sphere A vertically downwards and throws the sphere B horizontally at the same time. Neglecting the air friction, which of the following is the correct statement?
  • Both the spheres will reach the ground exactly simultaneously
  • Sphere A will reach the ground earlier
  • Sphere B will reach the ground earlier
  • The question is incomplete because the masses of the spheres are not given
A body is projected horizontally with speed 20 m/s from top of a tower. What will be its speed nearly after 5 sec? Take g = 10 m/s2
  • 54 m/s
  • 20 m/s
  • 50 m/s
  • 70 m/s
A projectile thrown at an angle of 45º to the horizontal has a range of 19.6 m. Its velocity at the highest point is (g = 10 m/s2)
  • 19.6 m/s
  • 5 m/s
  • 10 m/s
  • zero
ball is thrown from the ground with a velocity of 20√3 m/s making an angle of 60º with the horizontal. The ball will be at a height of 40 m from the ground after a time t equal to (g = 10 ms–2)
  • √2 sec
  • √3 sec
  • 2 sec
  • 3 sec
A shell is fired from a canon with a velocity v at angle θ with horizontal. At the highest point, it explodes into two pieces of equal mass. One of the pieces retraces its path to the canon. The speed of the other piece just after explosion is
  • 3 v cos θ
  • 2 v cos θ

  • Physics-Motion in a Plane-80541.png

  • Physics-Motion in a Plane-80542.png

Physics-Motion in a Plane-80544.png
  • 2
  • 0.5

  • Physics-Motion in a Plane-80545.png
  • 1
Two stones are projected with thesame velocity, in magnitude butmaking different angles with thehorizontal. Their ranges are equal. If the angle of projection of one is π/3 and its maximum height is y1, thenthe maximum height of the other willbe
  • 3 y1
  • 2 y1

  • Physics-Motion in a Plane-80547.png

  • Physics-Motion in a Plane-80548.png
A person aims a gun at a bird from a point, at a horizontal distance of 100m. If the gun can impact a speed of 500 ms–1 to the bullet at what height above the bird must he aim his gun in order to hit it? (g = 10 ms–2)
  • 10 cm
  • 20 cm
  • 50 cm
  • 100 cms
A particle P is sliding down a frictionless hemispherical bowl. It passes the point A at t = 0. At this instant of time, the horizontal component of its velocity is v. A bead Q of the same mass as P is ejected from A at t = 0 along the horizontal string horizontal string AB (see fig.) with the speed v. Friction between the bead and the string may be neglected. Let tP and tQ be the respective times taken by P and Q to reach the point B. Then
Physics-Motion in a Plane-80551.png
  • tP < tQ
  • tP < tQ
  • tP > tQ

  • Physics-Motion in a Plane-80552.png

Physics-Motion in a Plane-80553.png

  • Physics-Motion in a Plane-80554.png
  • 2)
    Physics-Motion in a Plane-80555.png

  • Physics-Motion in a Plane-80556.png

  • Physics-Motion in a Plane-80557.png
A particle rests on the top of a hemisphere of radius R. Find the smallest horizontal velocity that must be imparted to the particle if it is to leave the hemisphere without sliding down it.

  • Physics-Motion in a Plane-80559.png
  • 2)
    Physics-Motion in a Plane-80560.png

  • Physics-Motion in a Plane-80561.png

  • Physics-Motion in a Plane-80562.png

Physics-Motion in a Plane-80564.png
  • dependent on its mass
  • 4 rad/sec

  • Physics-Motion in a Plane-80565.png

  • Physics-Motion in a Plane-80566.png
A particle performing uniform circular motion has
  • a radial velocity and radial acceleration
  • a radial velocity and transverse acceleration
  • transverse velocity and radial acceleration
  • transverse velocity and transverse acceleration
A Car is moving with speed 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s2. What is the acceleration of the car
  • 2 m/s2
  • 2.7 m/s2
  • 1.8 m/s2
  • 9.8 m/s2
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Physics Quiz Questions and Answers