Question

A particle is projected at an angle of 45°, 8m away
from the foot of a wall, just touches the top of the
wall and falls on the ground on the opposite side at
a distance 4m from it. The height of wall is :
2
(1) Žm
(2) 3 m
(3) Žm
(4) Žm​

Answer 1

Answer:

8/3m

Explanation:

Use equation of trajectory

y= x tan45 (1- x/R)

R = range = 8+4 = 12

x = x coordinate = 8

y is y coordinate (answer)

By solving y = 8/3m

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