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A ball is thrown at angle alpha( 90^(@)g...

A ball is thrown at angle `alpha( 90^(@)gtalphagttheta)` on inclination plan as shown in figure. The minimum speed of the ball during the motion is:

A

`u cos alpha`

B

`u cos theta`

C

`u cos ( alpha- theta)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
Angle of projection with horizontal `=alpha- theta`
so minimum speed `=u cos (alpha- theta)`
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A2Z-MOTION IN TWO DIMENSION-Projection From Inclined Plane
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