Home
Class 12
PHYSICS
A body is projected horizontally from a ...

A body is projected horizontally from a height of 78.4 m with a velocity 10 `ms^(-1)` . Its velocity after 3 seconds is [g = 10 `ms^(-2)`] (Take direction of projection on `veci` and vertically upward direction on j)

A

` 10 hat i - 30 hat j`

B

`10 hat i + 30 hat j`

C

`20 hat - 30 hat j`

D

`10 hat i + 10 sqrt(3) hat j`

Text Solution

Verified by Experts

The correct Answer is:
A
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise EXERCISE-2 (Circular motion)|7 Videos

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise EXERCISE-3 (Parallelogram law, triangle law, polygon law)|4 Videos

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise EXERCISE-2 (Oblique project|30 Videos

  • MAGNETISM

    AAKASH SERIES|Exercise ADDITIONAL EXERCISE|22 Videos

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise QUESTION FOR DESCRIPTIVE ANSWER|7 Videos

Similar Questions

Explore conceptually related problems

A body is projected horizontally from the top of a tower with a velocity of 30 m/s. The velocity of the body 4 seconds after projection is (g = 10ms^(-2) )

A body is projected down from height of 60 m with a velocity 10 ms ^(-1) at angle 30^(@) to horizontal. The time of flight of the body is [g = 10 ms ^(-2)]

A body is projected with a velocity 50 "ms"^(-1) . Distance travelled in 6th second is [g=10 ms^(-2)]

A body is projected at angle 30° to horizontal with a velocity 50 ms^(-1) .In the above problem range of body is m. [g = 10 ms^(-2) ]

A body is projected horizontally with a velocity of 4sqrt2m//sec . The velocity of the body after 0.7 seconds will be bearly (Take g = 10 m/sec^(2) )

A body is projected at angle 30° to horizontal with a velocity 50 ms^(-1) . Its time of flight is (g=10 m//s^2 )

A stone is projected horizontally with a velocity 9.8 ms ^(-1) from a tower of height 100 m. Its velocity one second after projection is (g = 9.8 ms ^(-2)).

A body is projected at angle 30° to the horizontal with a velocity 50 ms^(-1) maximum height of projectile is

A body is projected at an angle 30° with a velocity 42 ms^(-1) Its maximum height is

A body is projected horizontally with a velocity of 4 ms^(-1) from the top of a high tower. The velocity of the body after 0.7 is nearly (Take, g = 10 ms^(-2))

Home
Profile