c) Velocity of the body
d) both mass and velocity of the body
24. Range of a projectile on a horizontal plane is same for the following pair of angles:
a) 30°and 60°
b) 20°and 80°
c) 0°and 45°
d) 10°and 90°
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0
Answer:
ANSWER
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.
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