1.

If two balls are projected at an angle of 60^(@) and 45^(@) and the total heights reached are same, then their initial velocities are in the ratio of ___

Answer»

`2sqrt(2):3`
`3:2sqrt(2)`
`3:2`
`SQRT(2):sqrt(3)`

Solution :Maximum height, `h_(MAX)=(u^(2)SIN^(2)THETA)/(2g),h_(max1)=h_(max2)`
`((mu_(1))/(mu_(2)))^(2)=(sin^(2)theta_(2))/(sin^(2)theta_(1))=(((1)/(sqrt(2)))^(2))/(((sqrt(3))/(2))^(2))=(1)/(2)xx(4)/(3)=(2)/(3)`
`u_(1):u_(2)=sqrt(2):sqrt(3)`


Discussion

No Comment Found