3.
An object is thrown horizontally from a point 'A' from a tower and hits the ground 3s later at B. The line from
'A' to 'B' makes an angle of 30° with the horizontal. The initial velocity of the object is : (take g = 10 m/s2)
Answers
Answered by
6
Answer:
Object takes 3s to fall.
Hence AC = height =
2
1
gt
2
=
2
1
×10×9=45m
Also:
tan30
∘
=
BC
AC
=
3
1
BC=
3
AC=45
3
m
The object covers AB in 3s, hence initial velocity =
3
BC
=15
3
ms
−1
Answered by
6
Object takes 3s to fall.
Hence AC = height =
2
1
gt
2
=
2
1
×10×9=45m
Also:
tan30
∘
=
BC
AC
=
3
1
BC=
3
AC=45
3
m
The object covers AB in 3s, hence initial velocity =
3
BC
=15
3
ms
−1
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