A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle of 30° with the horizontal. How far from the throwing point will be ball be at the height of 10 m from the ground ?[g=10ms^(-2),sin30^@=1/2,cos30^@=sqrt(3)/2]

A boy playing on the roof of a 10 m high building throws a ball with a

1.	A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle of 30° with the horizontal. How far from the throwing point will be ball be at the height of 10 m from the ground ?[g=10ms^(-2),sin30^@=1/2,cos30^@=sqrt(3)/2]
Answer» 8.66 m 5.20 m 4.33 m 2.60 m Solution :Here `R=(U^(2)sin2theta)/g=((10)^(2)sin60^@)/10` `5sqrt(3)=8.66m`

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A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle of 30° with the horizontal. How far from the throwing point will be ball be at the height of 10 m from the ground ?[g=10ms^(-2),sin30^@=1/2,cos30^@=sqrt(3)/2]

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