Saved Bookmarks
| 1. |
A rocket is moving such that the momentum of rocket is variable,and given as a function of time as P=(2t^3-t^2+18t+20)kgm/s.Find the force acting on the rocket at t=3 seconds. |
| Answer» F= d(2t^3 -t^2 +18t+20) /DT F= 6t^2-2t+18 here t= 3secF= 66N | |