[porjectile]Find the range of the angles (1 Viewer)

[Hikari Clover]

given that there r 2 angles for a particle to hit the top of a wall,
2 for hitting the bottom of the wall as well.....

if u r asked to find the range of the angles for the particle to hit th wall,they r all projected with the same speed..
1 of my friends says that it should be between the biggest and the smallest, (angle 1 ~ angle 4)
but another says that there r actually 2 sets of answer, 1~3, 2~4, indicated as the green region...

i m so confused, which should i trust

 

[iEdd]

If you make it into a cartesian equation, and equate y=0, that will be where it hits the bottom of the wall. Were you given ANY information?

 

[Hikari Clover]

回复: Re: [porjectile]Find the range of the angles

go with buddy number 2 he sounds way smarter

yeah, i agree, sounds more logical

 

[Hikari Clover]

回复: Re: [porjectile]Find the range of the angles

If you make it into a cartesian equation, and equate y=0, that will be where it hits the bottom of the wall. Were you given ANY information?

eh,i cant actually remember the Q, but the previous parts r just to ask u find the cartesian equation, and then find that 4 angles......

 

[iEdd]

Re: 回复: Re: [porjectile]Find the range of the angles

Yeah well there will be two angles for each. 45^o is the angle that gets you max range, all the other ranges will have two angles, spaced equally on either side of the 45 line. 40^o and 50^o for example, will bring the same range.