A basketball is thrown upward along a parabollic path. What is the ball's acceleration at its highest point?
Correct answer: D. g, downward
- A. 0
- B. 1/2g, horizontally
- C. g, upward
- D. g, downward
Explanation
At the highest point of travel, the vertical velocity is zero but since the force of gravity still is acting on it, the acceleration is equal to the acceleration due to gravity. Its value is 9.8 m/s2 at locations near the equator.
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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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