Saved Bookmarks
| 1. |
A stone of 1kg is thrown with a velocity of 20ms-1 across the frozen surface of a lake and comes to rest after travelling a distance of 50m. What is the force of friction between the stone and the ice. |
|
Answer» V²-U²/2S=A(RETARDATION DUE TO FORCE OF FRICTION) 400/100 4M/S²=A FORCE OF FRICTION= 4N |
|