A ball is thrown vertically upward with a velocity of 98 m/s. How long does it take to reach its highest point?
Correct answer: D. 10 seconds
- A. 2 seconds
- B. 5 seconds
- C. 7 seconds
- D. 10 seconds
- E. 15 seconds
Explanation
Given :u = 98 m/sg = -9.8 m/s². ( As it is thrown upwards)v = 0 (As it will stop after reaching the highest point)Using2gs = v² - u²2 × -9.8 × s = - (98 × 98)s = (98 × 98)/(2 × 9.8)s = 98 × 5s = 490 m.Now, Usingv = u + at0 = 98 - 9.8 × tt = 10 s
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