Saved Bookmarks
| 1. |
A ball of mass 200 grams falls from height of 5 meter ? What is its kinetic energy when it just reaches the ground ? (g = 9.18 ms-2 ) |
|
Answer» m = 200 grams = 0.2 kg h = 5 m u = 0 v = 7 v2 -u2 = 2gh v2– 02 = 2 x 9.8 x 5 v2 = 98 kinetic energy, KE = \(\frac{1}{2}mv^2\) \(\frac{1}{2} \times \frac{200}{1000}\) x 98 = 9.8 joule |
|