projectile concept help (1 Viewer)

[yashbb]

i have a question. when do i know to make because sometimes i have to for the height and others not. This is in regards to finding Sy btw.

 

[Lith_30]

when the projectile is launched horizontally. You can find through the following methods.

1. Use , since we can simplify the expression to

2. Use , which can be rearranged to

 

[yashbb]

when the projectile is launched horizontally. You can find through the following methods.

1. Use , since we can simplify the expression to

2. Use , which can be rearranged to

ohhhh ok thank you so much

 

[uniqueusername1]

i have a question. when do i know to make because sometimes i have to for the height and others not. This is in regards to finding Sy btw.

?

Uy=0 occurs when the projectile it at its max height

 

[yashbb]

?

Uy=0 occurs when the projectile it at its max height

but sometimes in questions where max height needs to be found, and the projectile has been launched horizontally, there is no higher the object can go and thus there is no upwards velocity is my understanding from @Lith_30 explanation.

 

[uniqueusername1]

but sometimes in questions where max height needs to be found, and the projectile has been launched horizontally, there is no higher the object can go and thus there is no upwards velocity is my understanding from @Lith_30 explanation.

yeah if it is launched horizontally the max height is at the initial velocity which is vy=0. Like throwing a ball off a table.

 

[yashbb]

yeah if it is launched horizontally the max height is at the initial velocity which is vy=0. Like throwing a ball off a table.

is it not more like rolling a ball off a table? because then there is no additional height.

 

[ExtremelyBoredUser]

is it not more like rolling a ball off a table? because then there is no additional height.

Yeah, if it is launched at an angle that is not vertical or horizontal, there will always be vertical and horizontal components for the velocity.

 

[uniqueusername1]

is it not more like rolling a ball off a table? because then there is no additional height.

yes thats what i meant lol.

 

[ExtremelyBoredUser]

but sometimes in questions where max height needs to be found, and the projectile has been launched horizontally, there is no higher the object can go and thus there is no upwards velocity is my understanding from @Lith_30 explanation.

I doubt they'd ask the max height for the projectile if it rolled of a table or its launched horizontally. The trajectory is half a parabola in essence so the point it rolled of or was "launched horizontally" would be max height. I presume they might ask for height the ball was launched at, and in that case you would simply use the equations to find it.



(since u_y = 0) (v_y = u_y+gt therefore v_y = gt)


note: this is given if the ball has 0 initial vertical velocity, if it doesn't you would just find use v_y = u_y + gt as normal.

 

[uniqueusername1]

I doubt they'd ask the max height for the projectile if it rolled of a table or its launched horizontally. The trajectory is half a parabola in essence so the point it rolled of or was "launched horizontally" would be max height. I presume they might ask for height the ball was launched at, and in that case you would simply use the equations to find it.



(since u_y = 0) (v_y = u_y+gt therefore v_y = gt)

View attachment 32914

Enjoy Mod 5 its really fun and Mod 6 is probs the most fun (hardest for some lol).
Mod 7 and 8 is just aight.

 

[uniqueusername1]

Bro buy the strive physics textbook and grind that. You'll easily get 90+

 

[ExtremelyBoredUser]

Enjoy Mod 5 its really fun and Mod 6 is probs the most fun (hardest for some lol).
Mod 7 and 8 is just aight.

Yeah I finished it, it was pretty good overall. I enjoyed P.M the most, Circular Motion and Space were pretty cool as well. I cant be bothered to start Mod 6.

also ye i already use strive its pretty mad

 

[yashbb]

Yeah, if it is launched at an angle that is not vertical or horizontal, there will always be vertical and horizontal components for the velocity.

Enjoy Mod 5 its really fun and Mod 6 is probs the most fun (hardest for some lol).
Mod 7 and 8 is just aight.

is mod 8 not really fun?

 

[yashbb]

Bro buy the strive physics textbook and grind that. You'll easily get 90+

whats strive, is it good?

 

[uniqueusername1]

is mod 8 not really fun?

na i liked mod 6 that best. Some interesting stuff like lenz law, transformers and faradays law etc...

 

[yashbb]

na i liked mod 6 that best. Some interesting stuff like lenz law, transformers and faradays law etc...

oh wow sounds really cool

 

[ExtremelyBoredUser]

whats strive, is it good?

its like a compilation of all past HSC questions organised for each module. Good for revision. Its thirty dollars but its worth it.

 

[uniqueusername1]

Mod 8 is all about stars, big bang and evolution of the atom -> basically explaining how the universe evolved

its aight

 

[yashbb]

Mod 8 is all about stars, big bang and evolution of the atom -> basically explaining how the universe evolved

its aight

it sounds cool, also what strive