InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
A ball is thrown up and attains a maximum height of 100 m, it is thrown upwards with a speed of:A. 9.8 ms-1B. 44.2 ms-1C. 19.69 ms-1D. 98 ms-1 |
|
Answer» A ball is thrown upward. So, Initial Speed = u Distance = s = 100 m Final Speed = v = 0 Acceleration = a = g = -9.8 ms-2 (negative, since acceleration is opposite the motion) Now, v2 = u2 + 2as 0 = u2 - 2 x 9.8 x 100 u = \(\sqrt {2\times9.8\times100}\) u = 44.27 ms-1 Hence, option B is correct. |
|