20. A ball is thrown with a speed of 17 ms-1 at a pro
jection angle of 53 degree
above the horizontal.
Determine
(i) the time of maximum height
(ii) the maximum height above the release point.
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11th
Physics
Motion in a Plane
Projectile Motion
A ball is thrown at a speed...
PHYSICS
A ball is thrown at a speed of 20m/s at an angle of 30
o
with the horizontal. The maximum height reached by the ball is (use g=10m/s
2
)
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ANSWER
Given : u=20 m/s θ=30
o
g=10 m/s
2
We get sinθ=sin30
o
=
2
1
Maximum height reached H=
2g
u
2
sin
2
θ
=
20
20×20×(
2
1
)
2
=5m
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