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Just after firing, a bullet is found to ...

Just after firing, a bullet is found to move at an angle of `37^(@)` to the horizontal. Its acceleration is `10 m//s^(2)` downwards. Find the component of its acceleration in the direction of its velocity.

Text Solution

Verified by Experts

`hat(v)=(1)/(5)(4hat(i)+3hat(j))`
`vec(a)=-ghat(j)`
vector Component of vector `vec(a)` in the direction of `vec(v)` is `(vec(a).hat(v))hat(v)` . Thus`-6m//s^(2)`.
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