Angle at which the projectile gains its maximum height:
Correct answer: D. 90o
- A. 0o
- B. 45o
- C. 60o
- D. 90o
Explanation
The correct answer is 90 degrees. When a projectile is launched at 90 degrees, it is directed straight up, maximizing the vertical component of its initial velocity and hence, reaching the maximum height. Other angles, such as 0, 45, or 60 degrees, result in a combination of vertical and horizontal motion, which does not maximize height. Specifically, 45 degrees maximizes range, not height.
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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