83. A body is projected with a certain speed at
angles of projection of 8 and 90-e, The
maximum height attained in the two cases are
20m and 10m respectively. The maximum
possible range is
4) 80 m
an m
Answers
Answered by
0
Answer:
in simple words the answer is 60
Explanation:
Maximum height in a projectile projected at an angle θ is given by:
H=
2g
u
2
sin
2
θ
.....(1)
H
1
=
2g
u
2
sin
2
θ
=20.....(2)
H
2
=
2g
u
2
sin
2
(90−θ)
=
2g
v
2
cos
2
θ
=10......(3)
H
2
H
1
=tan
2
θ=2......(4)
⇒
2g
u
2
=30
Now, R
max
=
g
u
2
sin2θ
=60sin2θ=60 m (at θ=45
o
)
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