Physics Help

[svenas]

I need help urgently plz
question 4

 

[svenas]

plzzzz anybody

 

[Minato112]

*Rectification*

Haha XD! When U look at it closely, only W has a component parallel to the inclined surface and not R. You get it now. Want me to show U on a sketch?

 

[svenas]

The answer is D if am not mistaken. Do u know the answer? Anyway wanna know how I came to this conclusion?

answer is A
i dont knw y?

 

[svenas]

The answer is D if am not mistaken. Do u know the answer? Anyway wanna know how I came to this conclusion?

ok hw we can find out the reason?

 

[Minato112]

answer is A
i dont knw y?

I rectified my earlier post. Check it

 

[svenas]

I rectified my earlier post. Check it

plz show me sketch
thx

 

[Minato112]

plz show me sketch
thx

As you can C in the picture, only W have a component parallel to the inclined plane

 

[svenas]

As you can C in the picture, only W have a component parallel to the inclined plane

aha thxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx rlly rlly
appreciate this....i ll find any other question I'll inbox u ok bro?

 

[Minato112]

aha thxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx rlly rlly
appreciate this....i ll find any other question I'll inbox u ok bro?

Oki No problem. I'll help where I can.

 

[Minato112]

Nice but you should spend more time reading the question. Component of R is parallel to the inclined force , therefore the resultant of R is zero. if R was inclined to the force, then your answer will be 100% correct.

Yup U R right, but srry I didnt get U for the last part... U implying that my answer isnt correct?

 

[aniekan]

Yup U R right, but srry I didnt get U for the last part... U implying that my answer isnt correct?

I can't really expain it in details cus i have little physics knowledge

 

[Minato112]

I can't really expain it in details cus i have little physics knowledge

But U C, my answer is correct, svenas confirmed it.

 

[svenas]

But U C, my answer is correct, svenas confirmed it.

another question about projectiles.....
answers =
part c i= 15.3 ms-1
c ii =all elastic to kinetic energy
part di velocity= 15.4 ms-1
actually in part di ...i didnt understand y we took 15.3 ms-1 as the horizontal velocity?
thxx

 

[aniekan]

another question about projectiles.....
answers =
part c i= 15.3 ms-1
c ii =all elastic to kinetic energy
part di velocity= 15.4 ms-1
actually in part di ...i didnt understand y we took 15.3 ms-1 as the horizontal velocity?
thxx

 

[svenas]

rlly helpful man thxxx
but he didnt say y he chose it as horizontal?

 

[aniekan]

well i don't know

 

[Minato112]

rlly helpful man thxxx
but he didnt say y he chose it as horizontal?

Please be clearer brother, what do U mean by why he chose it as horizontal?

 

[svenas]

Please be clearer brother, what do U mean by why he chose it as horizontal?

I mean why 15.3 ms-1 is the horizontal component of velocity?

 

[Minato112]

I mean why 15.3 ms-1 is the horizontal component of velocity?

Well I think it's quite logic, when the disc is first fired, it experiences a velocity horizontally (Thats why it moves horizontally at first and then gradually comes down).

Scientifically speaking, when it is fired horizontally, the disc has no vertical velocity component.

Hope I was clear.