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A body is projected vertically upward wi...

A body is projected vertically upward with the velocity `v=3hati+4hatjms^(-1)`. The maximum height attained by the body is (`g=10ms^(-2)`).

A

7m

B

1.25m

C

8m

D

0.08m

Text Solution

Verified by Experts

The correct Answer is:
A, B
`v=3hati+4hatj`
`H_(max)=(v^(2)sin^(2)theta)/(2g)=(v^(2))/(2g)" "[:.thet=90^(@)]`
`v=sqrt(9+16)=sqrt25`
`:.v^(2)=25" "H_(max)=(25)/(20)=(5)/(4)=1.25m`
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