When a stone is thrown horizontally with 2 m/s from a building of height 5 m then just before hitting the ground its acceleration is _.
Correct answer: C. 9.8 m/s^2
- A. 12 m/s^2
- B. 13 m/s^2
- C. 9.8 m/s^2
- D. 7.6 m/s^2
Explanation
When the stone is falling down, it falls in the category of projectile motion and in projectile motion we consider a=g=9.8 m/s^2.
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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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