For a projectile launched from level ground, the maximum range is obtained at a launch angle of
Correct answer: B. 45 degrees
- A. 30 degrees
- B. 45 degrees
- C. 60 degrees
- D. 90 degrees
Explanation
Range is proportional to sine of twice the launch angle, which is largest when twice the angle is 90 degrees, so the angle itself is 45 degrees. This assumes level ground and no air resistance; in real conditions the optimum drops slightly below 45 degrees. A launch at 90 degrees goes straight up and returns to the starting point with zero range.
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About Projectile Motion
Projectile motion combines uniform horizontal motion with vertically accelerated motion under gravity, assuming air resistance is neglected. Questions use the components of initial velocity to find time of flight, maximum height, horizontal range and position, while distinguishing projectile motion from general circular or one dimensional motion.
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