Question

9.
CE and DF are two walls of equal height (20 meter) from which to
projected A and B of same mass are projected as shown in the figure. A
projected horizontally towards left while B is proiected at an angle
(with horizontal towards left) with velocity 15 m/sec. If Always sees to
be moving perpendicular to EF. then the range of A on ground is
(1) 24 m
(2) 30 m
(3) 26 m
(4) 28 m
DANA NA​

Answer 1

Answer:

24 m

Explanation:

CE and DF are two walls of equal height (20 meter) from which to

projected A and B of same mass are projected as shown in the figure. A

projected horizontally towards left while B is proiected at an angle

(with horizontal towards left) with velocity 15 m/sec. If Always sees to

be moving perpendicular to EF.

as A always see B to moving perpendicularly

=> Va = VbCos37°

=> Va = 15 * 0.8

=> Va = 12 m/s

20 = (1/2)gt²

=> t = 2 sec using g = 10

Range = 12 * 2 = 24 m