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A projectile of mass 2kg has velocities ...

A projectile of mass `2kg` has velocities `3m//s` and `4m/s` at two points during its flight in the uniform gravitational field of the earth. If these two velocities are perpendicular to each other, then the minimum kinetic enerty of the particle during its flight is

A

6.32 J

B

8.40 J

C

16.32 J

D

5.76 J

Text Solution

Verified by Experts

The correct Answer is:
D
`rArr 4 cos theta=3 sin theta =v rArr theta=53^(@) & v=12//5 m//s`
`rArr " minimum KE"=1/2mv^(2)=1/2(2) ((12)/(5))^(2)=5.75J`
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