Home
Class 12
PHYSICS
Two projectiles, one fired from earth wi...

Two projectiles, one fired from earth with 5 ms -1 and other fired from a planet with 3 ms -1 at the same angle trace identical trajectories. Neglecting friction, what is the acceleration due to gravity on planet ?
(g = 9.8 m`s^(-1)` ):

A

3.5 `ms^(-2)`

B

`8.5ms^(-2)`

C

`1.5ms^(-2)`

D

`5.3ms^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`R=(u^(2)sin2theta)/gimplies Rpropu^(2)/g`
since `R_(e)=R_(p):. 25/g_(e)=9/g_(p)`
`:. G_(p)=9/25xx9.8=3.5ms^(-2)`
Promotional Banner

Topper's Solved these Questions

  • DESCRIPTION OF MOTION IN TWO AND THREE DIMENSION

    MODERN PUBLICATION|Exercise MCQ(LEVEL-II)|54 Videos

  • DESCRIPTION OF MOTION IN TWO AND THREE DIMENSION

    MODERN PUBLICATION|Exercise MCQ(LEVEL-III)(Questions from AIEEE/ JEE Examinations)|6 Videos

  • DESCRIPTION OF MOTION IN ONE DIMENSION

    MODERN PUBLICATION|Exercise Revision Test|45 Videos

  • E.M. INDUCTION AND A.C. CURRENTS

    MODERN PUBLICATION|Exercise RECENT COMPETITIVE QUESTIONS|31 Videos

Similar Questions

Explore conceptually related problems

The height y and the distance x along the horizontal plane of a prohectile on a certain planet (with no surrounding atmosphere) are given by y=8t- 5t^(2) meter and x=6t meter,where t is in seconds.The velocity with which the projectile is projected is (Acceleration due to gravity =9.8 m s^(-2) )

A stone is dropped from a height of 100 m and at the same time another stone is thrown vertically upwards with velocity of 40ms^(-1) . When and where will the two stones meet ? (g=10ms^(-2))

A ball is thrown vertically upwards with a velocity of 50ms^(-1) and the same later thrown at an angle for the maximum range. Compare the heights reached in the two cases (g=9.8ms^(-2))

At a hydroelectric power plant, the water pressure head is at a height of 300 m and the water flow available is 100m^(3)s^(-1) . If the turbine generator efficiency is 60%, estimate the electric power available from the plant (g=9.8ms^(-2)) .

From a rifle of mass 4 kg a bulllet of mass 50 g is fired units initial of 35 ms^(-1) calculate the initial recoil of velocity of rifle.

A stone dropped from the tope of a tower of height 300m high splashes into the water of a pond near the base of the tower. When is the splash heard at the top, given that the speed of sound in air is 340ms^(-1) ? ( g= 9.8 ms^(-2) )

MODERN PUBLICATION-DESCRIPTION OF MOTION IN TWO AND THREE DIMENSION-Revision TEST
  1. Two projectiles, one fired from earth with 5 ms -1 and other fired fro...

    Text Solution

    |

  2. The torque of a force vecF=-3hati+hatj+5hatk acting at a point is vect...

    Text Solution

    |

  3. The position vectors of the head and tail of radius vector are 2hati+h...

    Text Solution

    |

  4. Given vec r=2 hat i+hat j+hat k and vec P=2 hat i+3 hat j+hat k angula...

    Text Solution

    |

  5. The angle between two vectors vec A =vec B is theta. The resultant of ...

    Text Solution

    |

  6. Two forces of magnitude F and sqrt(3) F act at right angles to each ot...

    Text Solution

    |

  7. The magnitude of the vector product of two vectors is 4. The magnitude...

    Text Solution

    |

  8. ABCDEF is a regular hexagon with point O as centre. The value of vec(A...

    Text Solution

    |

  9. A projectile is projected horizontally with 8 ms^(-1) , its velocity a...

    Text Solution

    |

  10. Two projectiles are thrown with same velocity but at an angle theta an...

    Text Solution

    |

  11. A projectile is thrown with angle of projection tan^(-1)(4/3) The rati...

    Text Solution

    |

  12. The angle between two vectors 2 hat i+3 hat j+hat k and 3 hat i + 6 ha...

    Text Solution

    |

  13. If resultant of two forces vec F and vec F is F. The angle between two...

    Text Solution

    |

  14. A ball is projected at an angle 30° with the horizontal. What is the c...

    Text Solution

    |

  15. A body is projected with K.E. ‘E’ so as to have a maximum horizontal r...

    Text Solution

    |

  16. Angle which the vector vec A = 2 hat i+3 hat j makes with the y-axis i...

    Text Solution

    |

  17. If the magnitude of the vector product is sqrt(3) times the magnitude ...

    Text Solution

    |

  18. If vec(A).vec(B)=|vec(A)xxvec(B)|, then the resultant of vec(A) and ve...

    Text Solution

    |

  19. A ball is projected from a certain point on the surface of a planet at...

    Text Solution

    |

  20. The vector which must be added to the sum of the two vectors hat i+2 h...

    Text Solution

    |

  21. If the time of flight of a body is T and horizontal range is R, then t...

    Text Solution

    |