Question

Plzz guys answer Q5 and help me

Answer 1

H = R tan Ф / 4

R = 2 H

 

So tan Ф = 2(or yu can equate R=2H,  ➡v^2sin2 theta/g =2{v^2sin^2theta/g} ➡ tan theta =2) 

 

sin 2Ф = 2 * 2 / (1+2²)  ➡4/1+4 ➡4/5

 

range = v² sin 2Ф