a projectile motion q help! (1 Viewer)

[pink668]

two particles P and Q are fired simultaneously from 2 points A and B towards each other in the same vertical plane with speeds of projection 2u m/s and u m/s respectively. Q is projected so as to achieve a maximum range which is BA. if P and Q collide.

witre down the angle of projection of Q.

find the distance AB

find the angle of projection of P, correct to the nearest minute

find the height at which the particles collide.

thank you!

 

[ianc]

two particles P and Q are fired simultaneously from 2 points A and B towards each other in the same vertical plane with speeds of projection 2u m/s and u m/s respectively. Q is projected so as to achieve a maximum range which is BA. if P and Q collide.

witre down the angle of projection of Q.

45 degrees

find the distance AB

From the question, it said Q had a range of AB.

So to find this range:

 

[vafa]

solution:
View attachment 13879

View attachment 13880

View attachment 13881

 

[pink668]

why is it 45?

 

[BIRUNI]

Refer to Vafa's solution for reasoning.