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A plane is flying horizontally at 98" ms...

A plane is flying horizontally at `98" ms"^(–1)` and releases an object which reaches the ground in 10 s. The angle made by it with the horizontal while hitting the ground is:

A

`55^(@)`

B

`45^(@)`

C

`60^(@)`

D

`75^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(y)=u_(y)+a_(y)t`
`v_(y)=0+9.8xx10=98m//s`
`tan theta=(v_(y))/(v_(x))=(98)/(98)=1`
`theta=45^(@)`
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