Question

189. The range of a projectile when fired at 60° to the
horizontal is 0.5 km. What will be its range when
fired at 45° with the same speed ?

(1) 0.5 km
(2) 1.0/√3km
(3) 1.5 km
(4) 2.0 km​

Answer 1

Answer:

B

Explanation:

Correct option is B)

R

1

=

g

u

2

sin150

=

g

u

2

sin(180−30)

=

g

u

2

sin30

=

2g

u

2

=0.5

R

2

=

g

u

2

sin90

=

g

u

2

=2R

1

=1.0km