Home
Class 12
PHYSICS
The initial position of an object at res...

The initial position of an object at rest is given by `3 hati - 8 hatj`. It moves with constant acceleration and reaches to the position `2 hati +4hatj` after 4s. What is its acceleration ?

A

` - 1/8 hati + 3/2 hatj`

B

` 2hati - 1/8 hatj`

C

`- 1/2hati 8 hatj`

D

` 8hati -3/2 hatj`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PLANE

    AAKASH INSTITUTE ENGLISH|Exercise Assignement section -B Objective (one option is correct)|29 Videos

  • MOTION IN A PLANE

    AAKASH INSTITUTE ENGLISH|Exercise Assignement section -C Objective (More than one option is correct)|7 Videos

  • MOTION IN A PLANE

    AAKASH INSTITUTE ENGLISH|Exercise Try yourself|48 Videos

  • MOCK_TEST_17

    AAKASH INSTITUTE ENGLISH|Exercise Example|15 Videos

  • MOTION IN A STRAIGHT LINE

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - D)|15 Videos

Similar Questions

Explore conceptually related problems

The velocity of an object at t =0 is vecv_(0) =- 4 hatj m/s . It moves in plane with constant acceleration veca = ( 3hati + 8 hatj) m//s^(2) . What is its velocity after 1 s?

The velocity of an object is given by vecv = ( 6 t^(3) hati + t^(2) hatj) m//s . Find the acceleration at t = 2s.

The velocity of an object is given by vecv = ( 6 t^(3) hati + t^(2) hatj) m//s) . Find the acceleration at t = 2s.

An object starts from rest, and moves under the acceleration veca = 4hati . Its position after 3 s is given by vecr = 7 hati + 4hatj . What is its initial position ?

A body starts with a velocity 2 hati +3hatj +11 hatk m/s and moves with an acceleration 10 hati +10 hatj +10 hatk m//s^2 . What is its velocity after 0.2 seconds ?

A body lying initially at point (3,7) starts moving with a constant acceleration of 4 hati . Its position after 3s is given by the coordinates

The position of an object changes from vecr = ( 2hati + hatj) " m to " vecr_(1) = ( 4hati + 3hati) m in 2s. Find its average velocity.

A body starts with a velocity (2hati + 3hatj + 11hatk) m/s and moves with an acceleration (5hati + 5hatj - 5hatk) m//s^(2) . What is its velocity after 0.2 sec ?

Assertion : Velocity and acceleration of a particle are given as, v=hati-hatj and a=-2 hati+2 hatj This is a two dimensional motion with constant acceleration. Reason : Velocity and acceleration are two constant vectors.

A particle P is at the origin starts with velocity u=(2hati-4hatj)m//s with constant acceleration (3hati+5hatj)m//s^(2) . After travelling for 2s its distance from the origin is

AAKASH INSTITUTE ENGLISH-MOTION IN A PLANE-Assignement section -A Objective (one option is correct)
  1. The position vector of an object at any time t is given by 3t^(2) hati...

    Text Solution

    |

  2. A body lying initially at point (3,7) starts moving with a constant ac...

    Text Solution

    |

  3. The initial position of an object at rest is given by 3 hati - 8 hatj....

    Text Solution

    |

  4. If |vecP + vecQ|= | vecP| -|vecQ| , the angle between the vectors ve...

    Text Solution

    |

  5. if |vecP + vecQ| = |vecP| + |vecQ| , the angle between the vectors ...

    Text Solution

    |

  6. if vecP a+ vecQ =vec0 , then which of the following is necessarily t...

    Text Solution

    |

  7. A displacement vector of magnitude 4 makes an angle 30^(@) with the x...

    Text Solution

    |

  8. If |vecP + vecQ| = |vecP -vecQ| the angle between vecP and vecQ is

    Text Solution

    |

  9. if vecP +vecQ = vecP -vecQ , then

    Text Solution

    |

  10. At the topmost point of a projectile trajectory, its velocity and acce...

    Text Solution

    |

  11. For angle of prijection of projectile at angle(45^(@)-theta) and (45^...

    Text Solution

    |

  12. A cricket ball of mass m is hitted at the angle 45^(@) to the horizont...

    Text Solution

    |

  13. The path of a projectile is

    Text Solution

    |

  14. Two cars of masses m(1)" and" m(2) are moving in circles od radii r(1)...

    Text Solution

    |

  15. Which of the following is not a projectile ?

    Text Solution

    |

  16. The maximum number of rectangular components into which a vector in sp...

    Text Solution

    |

  17. If a stone projected from ground, takes 4 s to reach the topmost point...

    Text Solution

    |

  18. A projectille covers a horizontal distance of 6 m, when it reaches 10 ...

    Text Solution

    |

  19. An arrow shots from a bow with velocity v at an angle theta with the ...

    Text Solution

    |

  20. The maximum height attained by a ball projected with speed 20 ms^(-1)...

    Text Solution

    |