What is the acceleration of a projectile at its highest point:
Correct answer: D. g
- A. Maximum
- B. Zero
- C. Minimum
- D. g
Explanation
In projectile motion, the only force acting is gravity, which causes a constant downward acceleration of g (approximately 9.8 m/s2). This remains true throughout the projectile's flight, including at the highest point. At the highest point, the vertical component of velocity is zero, but the acceleration due to gravity is still present, pulling the projectile downward. Therefore, the acceleration is not zero, maximum, or minimum; it is consistently g. Options A, B, and C are incorrect because they suggest a variation or absence of acceleration, which contradicts the constant presence of gravitational acceleration.
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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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