For which value of θ is the range of a projectile fired from ground level a maximum? A) 30° above the horizontal B) 45° above the horizontal C) 55° above the horizontal D) 60° above the horizontal E) 90° above the horizontal.For which value of θ is the height of a projectile fired from ground level a maximum? A) 30° above the horizontal B) 45° above the horizontal C) 55° above the horizontal D) 60° above the horizontal E) 90° above the horizontal.If the initial speed of a projectile is doubled. A) Its range will be increased by 1.41. B) Its range will double. C) Its range will be decreased by a factor of two. D) Its range will quadruple. E) Its range will decrease by a factor of four.

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For which value of θ is the range of a projectile fired from ground level a maximum?
A) 30° above the horizontal
B) 45° above the horizontal
C) 55° above the horizontal
D) 60° above the horizontal
E) 90° above the horizontal

For which value of θ is the height of a projectile fired from ground level a maximum?
A) 30° above the horizontal
B) 45° above the horizontal
C) 55° above the horizontal
D) 60° above the horizontal
E) 90° above the horizontal

If the initial speed of a projectile is doubled.
A) Its range will be increased by 1.41.
B) Its range will double.
C) Its range will be decreased by a factor of two.
D) Its range will quadruple.
E) Its range will decrease by a factor of four.

A projectile is launched with initial velocity v0 at an angle of 30° above the horizontal. If a second projectile is launched with the same initial velocity but at angle of 60° above the horizontal.
A) The range of the second projectile will be twice that of the first.
B) The range of the second projectile will be 1.41 that of the first.
C) The range of the second projectile will be one-half that of the first.
D) The ranges of the two projectiles will be identical.
E) It is impossible to compare the ranges of the two projectiles.

A ball is thrown with a velocity of 40 m/s at an angle of 30° above the horizontal and attains a certain range R. At what other angle will this ball attain the same range keeping its initial velocity the same?
A) 15°
B) 90°
C) 120°
D) 60°
E) All other angles will give different ranges.

EXPERT ANSWER


For which value of θ is the range of a projectile fired from ground level a maximum?
A) 30° above the horizontal
B) 45° above the horizontal
C) 55° above the horizontal
D) 60° above the horizontal
E) 90° above the horizontal

Answer :B) 45° above the horizontal

For which value of θ is the height of a projectile fired from ground level a maximum?
A) 30° above the horizontal
B) 45° above the horizontal
C) 55° above the horizontal
D) 60° above the horizontal
E) 90° above the horizontal

Answer :E) 90° above the horizontal

If the initial speed of a projectile is doubled.
A) Its range will be increased by 1.41.
B) Its range will double.
C) Its range will be decreased by a factor of two.
D) Its range will quadruple.
E) Its range will decrease by a factor of four.

Answer :D) Its range will quadruple.

A projectile is launched with initial velocity v0 at an angle of 30° above the horizontal. If a second projectile is launched with the same initial velocity but at angle of 60° above the horizontal.
A) The range of the second projectile will be twice that of the first.
B) The range of the second projectile will be 1.41 that of the first.
C) The range of the second projectile will be one-half that of the first.
D) The ranges of the two projectiles will be identical.
E) It is impossible to compare the ranges of the two projectiles.

Answer :D) The ranges of the two projectiles will be identical.

A ball is thrown with a velocity of 40 m/s at an angle of 30° above the horizontal and attains a certain range R. At what other angle will this ball attain the same range keeping its initial velocity the same?
A) 15°
B) 90°
C) 120°
D) 60°
E) All other angles will give different ranges.

Answer : D) 60°