Home
Class 11
PHYSICS
Statement I: If a ball projected up obli...

Statement I: If a ball projected up obliquely from the ground breaks up into several fragments in its path, the centre of the system of all fragments moves in the same parabolic path compared to initial one till all fragments are in air.
Statement II: In the situation of Statement 1, at the instant of breaking, the fragments may be thrown in different directions with different speeds.

A

Statement -1 is True, Statement -2 si True , Statement -2 is a correct explanation for Statement -1.

B

Statement -1 is True, Statement -2 si True , Statement -2 is not correct explanation for Statement -1.

C

Satement-1 is True, Statement-2 is Satement-1 is True, Statement-2 is False.False.

D

Satement-1 is False, Statement-2 is True.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CENTRE OF MASS

    ALLEN |Exercise EXERCISE-IV A|32 Videos
  • CENTRE OF MASS

    ALLEN |Exercise EXERCISE-IV B|14 Videos
  • CENTRE OF MASS

    ALLEN |Exercise EXERCISE-II|43 Videos
  • BASIC MATHEMATICS USED IN PHYSICS &VECTORS

    ALLEN |Exercise EXERCISE-IV ASSERTION & REASON|11 Videos
  • ELASTICITY, SURFACE TENSION AND FLUID MECHANICS

    ALLEN |Exercise Exercise 5 B (Integer Type Questions)|3 Videos

Similar Questions

Explore conceptually related problems

An object of mass 5 kg is projecte with a velocity of 20ms^(-1) at an angle of 60^(@) to the horizontal. At the highest point of its path , the projectile explodes and breaks up into two fragments of masses 1kg and 4 kg. The fragments separate horizontally after the explosion, which releases internal energy such that K.E. of the system at the highest point is doubled. Calculate the separation betweent the two fragments when they reach the ground.

Flow cytometry, illustrated in the figure, is a technique used to sort cells by type. The cells are placed in a conducting saline solution which is then forced from a nozzle. The stream breaks up into small droplets, each containing one cell. A metal collar surrounds the stream right at the point where the droplets seprate from the stream. Charging the collar polarizes the conducting liquid, causing the droplets to become charged as they break off from the steam. A leser beam probes the solution just upstream from the charging collar, looking for the presence of certain types of cells. All droplets containing one particular type of cell are given the same charge by the charging collar. Droplets with other desired types of cells receive a different charge, and droplats with no desired cell receive no charge. The charged. The charges droplets then pass between two parallel charged electrodes where they receive a horizontal force that directs force that directs them into different collection tubes, depending on air charge.

Flow cytometry, illustrated in the figure, is a technique used to sort cells by type. The cells are placed in a conducting saline solution which is then forced from a nozzle. The stream breaks up into small droplets, each containing one cell. A metal collar surrounds the stream right at the point where the droplets seprate from the stream. Charging the collar polarizes the conducting liquid, causing the droplets to become charged as they break off from the steam. A leser beam probes the solution just upstream from the charging collar, looking for the presence of certain types of cells. All droplets containing one particular type of cell are given the same charge by the charging collar. Droplets with other desired types of cells receive a different charge, and droplats with no desired cell receive no charge. The charged. The charges droplets then pass between two parallel charged electrodes where they receive a horizontal force that directs force that directs them into different collection tubes, depending on air charge. Another way to sort the droplets would be to given each droplet the same charge, then vary the electric field between the deflection plates. For the apparatus as sketched, this technique will not work because

Einstein in 1905 proppunded the special theory of relativity and in 1915 proposed the general theory of relativity. The special theory deals with inertial frames of reference. The general theory of relativity deals with problems in which one frame of reference. He assumed that fixed frame is accelerated w.r.t. another frame of reference of reference cannot be located. Postulated of special theory of realtivity ● The laws of physics have the same form in all inertial systems. ● The velocity light in empty space is a unicersal constant the same for all observers. ● Einstein proved the following facts based on his theory of special relativity. Let v be the velocity of the speceship w.r.t a given frame of reference. The obserations are made by an observer in that reference frame. ● All clocks on the spaceship wil go slow by a factor sqrt(1-v^(2)//c^(2)) ● All objects on the spaceship will have contracted in length by a factor sqrt(1-v^(2)//c^(2)) ● The mass of the spaceship increases by a factor sqrt(1-v^(2)//c^(2)) ● Mass and energy are interconvertable E = mc^(2) The speed of a meterial object can never exceed the velocity of light. ● If two objects A and B are moving with velocity u and v w.r.t each other along the x -axis, the relative velocity of A w.r.t. B = (u-v)/(1-uv//v^(2)) A stationary body explodes into two fragments each of rest mass 1 kg that move apart at speed of 0.6c relative to the original body. The rest mass of the original body is -

In each situation of column-I, a system involving two bodies is given. All strings and pulleys are light and friction is absent everywhere. Initially each body of every system is at rest. Consider the system in all situation of column I from rest till any collision occurs. Then match the statements in column - I with the corresponding results in column - II

In the shown expermiental setup to study photoelectric effect, two conducting electrodes are enclosed in an evacuated glass-tube as shown. A parallel beam of monochromatic light, falls on photosensitive electrodes. The emf of battery shwon is high enough such that all photoelectron ejected from left electrode will reach the right electrode. Under initial conditions photoelectrons are emitted. AS changes are made in each situation of column-I, Match the statements in column-I with results in column-II. {:(,"Column I",,"Column II"),((A),"If frequency of incident light is increased keeping its intensity constant",(p),"magnitude of stopping potential"),((B),"If frequency of incident light is increased and its intensity is decreased",(q),"current through circuit may stop"),((C),"If work function of photo sensitive electrode is increased",(r),"maximum kinetic energy of ejected photoelectrons will increase"),((D),"If intensity of incident light is increased keeping its frequency constant",(s),"saturation current will increase"):}

A block is released on the slant face of a wedge of equal mass placed on a horizontal floor. The slant face of the wedge makes an angle of 45^(@) with the floor. Coefficient of friction between all surfaces in contact is the same. Different value/ range of coefficient of friction is given in column I and corresponding consequences in column II and III (wedge is fress to move) {:(,"Column-I",,"Column-II",,"Column-III",),((I),mu=0,(i),"Work done by friction on block and wedge is negative (on each)",(P),"Centre of mass of system (block+wedge) moves rightward and downward",),((II),mu gt 1,(ii),"Work done by friction on block is negative but on wedge it is zero",(Q),"Centre of mass of system (block+wedge) moves leftward and downward",),((III),sqrt(5)-2 lt mu lt 1,(iii),"Work done by friction on block and wedge is zero (on each)",(R ),"Centre of mass of system (block+wedge) remains at rest",),((IV),mu lt sqrt(5) - 2,(iv),"Friction between the block and wedge is static and between the wedge and ground it is kinetic in nature.",(S),"Centre of mass of system (block+wedge) moves vertically downward",):} Which of the following options is the correct representation of the case that the wedge remains motionless and the block slides down

Which option shows all correct statements about fragmentation ? (I) Fragmentation is observed in spongilla, Sycon and Hydra (II) The body become fragmented in to several distinct parts. (III) Each part develops the remaining body parts and becomes a complete animals. (A) (I) (B) (I), (II) and (III) (C) (II) and (III) (D) (III)

ALLEN -CENTRE OF MASS-EXERCISE-III
  1. Statement I: No external force acts on a system of two spheres which u...

    Text Solution

    |

  2. Statement I: If a sphere of mass mmoving with speed u undergoes a perf...

    Text Solution

    |

  3. Statement I: If a ball projected up obliquely from the ground breaks u...

    Text Solution

    |

  4. Comprehension # 1 If net force on a system in a particular direction...

    Text Solution

    |

  5. Comprehension # 1 If net force on a system in a particular direction...

    Text Solution

    |

  6. Comprehension # 1 If net force on a system in a particular direction...

    Text Solution

    |

  7. Comprehension # 1 If net force on a system in a particular direction...

    Text Solution

    |

  8. Comprehension # 2 When two bodies collide normally they exert equal ...

    Text Solution

    |

  9. Comprehension # 2 When two bodies collide normally they exert equal ...

    Text Solution

    |

  10. A ball collides at B with velocity 10m//s at 30^(@) with vertical. The...

    Text Solution

    |

  11. Comprehension # 4 When the mass of a sytem is variable, a thrust for...

    Text Solution

    |

  12. Comprehension # 4 When the mass of a sytem is variable, a thrust for...

    Text Solution

    |

  13. Comprehension # 5 One particle of mass 1 kg is moving along positive...

    Text Solution

    |

  14. Comprehension # 5 One particle of mass 1 kg is moving along positive...

    Text Solution

    |

  15. Comprehension # 5 One particle of mass 1 kg is moving along positive...

    Text Solution

    |

  16. Comprehension # 6 A 1 kg block is given a velocity of 15 m//s toward...

    Text Solution

    |

  17. Comprehension # 6 A 1 kg block is given a velocity of 15 m//s toward...

    Text Solution

    |

  18. Comprehension # 6 A 1 kg block is given a velocity of 15 m//s toward...

    Text Solution

    |

  19. Two blocks of equal mass m are connected by an unstretched spring and ...

    Text Solution

    |

  20. Two blocks of equal mass m are connected by an unstretched spring and ...

    Text Solution

    |