In the absence of air resistance, a projectile launched at the same speed at any angle will attain the greatest range when projected at
A)30°.
B)45°.
C)60°.
D)90°.
In the case of throwing a heavy spear, not at the same speed but with the same force, the greatest range is attained more likely when thrown at
E)30°
F)45°
G)60°
H)90°

Question

Quizplus · Accepted Answer

For a projectile launched in a vacuum (no air resistance), the angle that gives the greatest range is 45°, because it provides the optimal balance between horizontal distance and vertical height. When throwing a heavy spear with the same force, the optimal angle shifts lower due to the spear's weight and the force dynamics involved, making 30° more likely to achieve the greatest range.

In the Absence of Air Resistance, a Projectile Launched at the Same