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If a body is projected with angle theta ...

If a body is projected with angle `theta` to the horizontal, then ·

A

Its velocity is always perpendicular to its acceleration

B

Its velocity becomes zero at its maximum height

C

Its velocity makes zero angle with the horizontal at its maximum height

D

The body just before hitting the ground, the direction of velocity coincides with the acceleration.

Text Solution

Verified by Experts

`barV= 2hati+chatj`
`bara= 3hati+ 4hatj`
Since `barV` and`bara` are perpendicular to each other,
`impliesbarV.bara=0`
`implies(2hati+chatj).(3hati+4hatj)=0`
`implies6+4c=0`
`:.c=-6/4=-1.5`
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