Question

what must be minimum velocity of a missile if it is fired like projectile and is intended to strike the target 100m away? ​

Answer 1

Answer:

.................... . ... . . . . .. . . ........ .. ...

Answer 2

Explanation:

the time taken to reach the position

be t

then R=u²sin(2ø)/g

R=100

100=u²sin(2ø)/g

100g=u²sin(2ø)

100g=2u²sinø cosø

50g/cosø=u²sinø

50g/ucosø=usinø

t=2u sinø/g

t=2(50g/ucosø)/g

t=100g/u cosø ×g

t=100/u cosø

let ø=45°

t=100/u/_/2

t=100_/2/u

ut=100_/2

u=100_/2/t

100= 20000 sin90/t²g

100=20000/t² 10

100=2000/t²

100t²=2000

t²=2000/100

t²=20

t=2_/5s

t=2u sinø/g

2_/5=2u sin 45/g

2_/5g=2u/_/2

2_/5g=_/2u

20_/5=_/2u

u=10 root 10 m/s

it is the answer i think