Question

13. 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 largest
range?
A
B
с
D​

Answer 1

Answer:

Let u be the equal speed of all four bodies.

Range, R=gu2sin2θ

Range of A, R1=gu2sin30o=2gu2

Range of B, R2=gu2sin60o=2g3u2

Range of C, R3=gu2sin90o=gu2

Range of D, R4=gu2sin120o=2g3u2

Hence, option (A) is correct