Question bank/JEE Main/Physics

A projectile is projected at an angle of 37° to the horizontal. When
it is projected at 53°, its time of flight on level ground would have
been 1 sec. more. At what angle should it be projected so that its range
is 10 m less than either of the situations ?

A26.5°B30°C18°D15°
37° 53°
1
10 m ?

Show answer and solution▾

[IMAGE] T1 =[IMAGE] (sin 53° - sin 37°) = 1
R =[IMAGE] = 60 m
R' = 50 =[IMAGE] = sin 2θ
2θ = 53°
TOPIC:KINEMATIC
SUB TOPIC: 2 D

Source: Grass-G / P-03 Paper 1 (Physics) Eng. + Hindi 24-8-2020.docx