Home
Class 12
PHYSICS
An aeroplane moving horizontally with a ...

An aeroplane moving horizontally with a speed of 180km/hr. drops a food packet while flying at a height of 490m. The horizontal range of the packet is:-

A

180m

B

980m

C

500m

D

670m

Text Solution

Verified by Experts

The correct Answer is:
C
`x=txxu=sqrt((2h)/(g))xxu=sqrt((2xx490)/(9.8))xx50=500m`
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PALNE

    ALLEN |Exercise EXERCISE-3|41 Videos

  • MOTION IN A PALNE

    ALLEN |Exercise SOLVED EXAMPLE|28 Videos

  • MOTION IN A PALNE

    ALLEN |Exercise EXERCISE-1|99 Videos

  • KINEMATICS-2D

    ALLEN |Exercise Exercise (O-2)|47 Videos

  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN |Exercise EXERCISE (JA)|4 Videos

Similar Questions

Explore conceptually related problems

An Indian fighter plane flying horizontally with speed 800 km/hr releases a bomb (on Pakistan bunker) at a height of 78.4 m from the ground, when will the bomb strike the ground ? Give your answer in second. [g=9.8 m//s^(2)]

A helicopter is moving in upward direction with speed of 10 m/s. If the length of the helicopter is 10 m and the horizontal component of magnetic field of earth is 1.5 xx 10^(-3) "Wb"/ m^2 then the induced emf produced across the foremost (nose) and end part (tail) of the helicopter will be ____

A stone is projected from the ground in such a direction so as to hit a bird on the top of a telegraph post of height h and attains the maximum height of 2h above the ground. If at the insatant of projection, the bird were to fly away horizontally with a uniform speed, find the ratio between the horizontal velocity of bird and the horizontal component of velocity of stone, if the stone hits the bird while descending.

In a different planet, the acceleration due to gravity is 2m//s^(2) . A particle is thrown horizontally at a speed of 3 m//s from a height of 10 m . The equation of trajectory of the particle comes out to be x^(2)=alphay . Find the value of alpha [Take +X- axis alonf the direction of projection and +Y axis towards the surface of planet.]

A plate of area 2m^(2) is made to move horizontally with a speed of 2m//s by applying a horizontal tangential force over the free surface of a liquid. If the depth of the liquid is 1m and the liquid in contact with the bed is stationary. Coefficient of viscosity of liquid is 0.01 poise. Find the tangential force needed to move the plate.

In the given figure points A and C are on the horizontal ground & A and B are in same vertical plane. Simultaneously bullets are fired from A, B and C and they collide at D. The bullet at B is fired horizontally with speed of 72/5 km//hr and the bullet at C is projected vertically upward at velocity of 54/5 km//hr . Find velocity of the bullet projected from A in m//s .

A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The moves horizontally with a speed of 2m//s . At what angle alpha with the vertical should the wind screen placed so that the rain drops falling vertically downwards with velcoity 6m//s strike the wind screen perpendicularly?

An aeroplane is flyind horizontally at a height of 2 km and with a velocity of 720 km/h. A bag containing ration is to be dropped to the Jawans on the ground then find out (i) How far from the Jawans should the bag be released so that it falls directly over them (ii) Time taken by bag to reach the ground (iii) Velocity of bag when it reach the ground. (iv) At which angle the bag will reaches the ground. (v) What path of bag will be appeared to pilot (vi) What path of bag will be appeared to Jawans. (vii) Position of aeroplane when bag reaches to the Jawans. (g=10m//s^(2))

A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an anti - aircraft gun . At what angle from the vertical should the gun be fired for the shell with muzzle speed 600"ms"^(-1) to hit the plane ? At what minimum altitude should the pilot fly the plane to avoid being hit ? (Take g= 10 " ms "^(-2)) .

A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m//s at an angle of 30(@) with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground ? [ g = 10m//s^(2) , sin 30^(@) = (1)/(2) , cos 30^(@) = (sqrt(3))/(2)]

ALLEN -MOTION IN A PALNE-EXERCISE-2
  1. In the Q.23, the maximum height attained by the arrow is:-

    Text Solution

    |

  2. In the Q.23, the vertical component of the velocity is:-

    Text Solution

    |

  3. what is the angle? when sin (theta)=4 and cos (theta)=5

    Text Solution

    |

  4. The ceiling of a hall is 40m high. For maximum horizontal distance, th...

    Text Solution

    |

  5. a body is thrown horizontally with a velocity sqrt(2gh) from the top o...

    Text Solution

    |

  6. When a particle is thrown horizontally, the resultant velocity of the ...

    Text Solution

    |

  7. A ball is projected upwards from the top of a tower with a velocity 50...

    Text Solution

    |

  8. A ball is thrown at different angles with the same speed u and from th...

    Text Solution

    |

  9. Two balls A and B are thrown with speeds u and u//2, respectively. Bot...

    Text Solution

    |

  10. At what angle with the horizontal should a ball be thrown so that the ...

    Text Solution

    |

  11. The velocity of projection of oblique projectile is (6hati+8hatj)ms^(...

    Text Solution

    |

  12. An aeroplane moving horizontally with a speed of 180km/hr. drops a foo...

    Text Solution

    |

  13. A plane is flying horizontally at 98ms^(-1) and releases and object wh...

    Text Solution

    |

  14. If the range of a gun which fires a shell with muzzle speed V is R , t...

    Text Solution

    |

  15. A stuntman plans to run across a roof top and then horizontally off it...

    Text Solution

    |

  16. The maximum range of a projecitle fired with some initial velocity is ...

    Text Solution

    |

  17. The angle of which the velocity vector of a projectile thrown with a v...

    Text Solution

    |

  18. Two particles are separated at a horizontal distance x as shown in (Fi...

    Text Solution

    |

  19. A particle is projected an angle of 45^(@) from 8m before the foot of ...

    Text Solution

    |

  20. From the the top of a tower 19.6 m high, a ball is thrown horizontally...

    Text Solution

    |