Question

5. Four bodies A, B, C and D are projected
with the same speed
at the angles 10 , 20 °, 30°, 40,
respectively, with respect to
the Earth. Which particle has the smallest
range?
A
B
C
D​

Answer 1

Explanation:

Let u be the equal speed of all four bodies.

Range, R=

g

u

2

sin2θ

Range of A, R

1

=

g

u

2

sin30

o

=

2g

u

2

Range of B, R

2

=

g

u

2

sin60

o

=

2g

3

u

2

Range of C, R

3

=

g

u

2

sin90

o

=

g

u

2

Range of D, R

4

=

g

u

2

sin120

o

=

2g

3

u

2

Hence, option (A) is correct.

Answer By SaptarshiMaity