Question

30°
30°
18. A projectile is fired with a velocity u at right angles to the slope, which is inclined
at an angle with the horizontal. Derive an expression for the distance R to the
point of impact.
Relative Motion in Projectiles
Note The problems can also be solved without using the concept of relative motion.
19. A particle is projected upwards with velocity 20 m/s. Simultaneously another particle i
velocity 2012 m/s at 45°. (g = 10 m/s 2 )
(a) What is acceleration of first particle relative to the second?
(b) What is initial velocity of first particle relative to the other?
(c) What is distance between two particles after 2 s?
20. Passenger of a train just drops a stone from it. The train was moving with constant velo
of the stone as observed by​

Answer 1

Answer:

ux=0,ax=gsinθuy=u,ay=−gcosθY=0=uyt+21ayt2⇒T=−ay2uy=gcosθ2uR=uxT+21axT2=21gsinθ(gcosθ2u)2=gcosθ2u2tanθ