Question

A projectile is projected from ground with a speed of 10 ms' For what angle of
projection a, the horizontal range will be given by 5 m <R < 6 m?
a. a [15, 18.5° ] [30°, 60°)
b. t [15° 18 5 1 715 751
c. 15° < a < 18.5°
d. 71.5° <a <75°​

Answer 1

Correct option is

A

3

10

As the projectile has no acceleration in horizontal direction, thus its velocity component in horizontal direction remains constant.

Velocity component of projectile initially V

x

=10cos60

o

=10×0.5=5 m/s

∴ Velocity component of projectile after some time V

x

′

=V

x

=5 m/s

Now angle made by speed with horizon