1. The problem statement, all variables and given/known data A frictionless sloping plank is 6m long .An oil drum of 300N is raised up the sloping plank by an effort of 15N.Calculate the height to which the oil drum rises . 1) 2m 2) 7m 3) 3m 4) 0.3m 2. Relevant equations 3. The attempt at a solution I am not able to interpret the problem correctly.I can do the problem if only I understand the statement given . Is the sloping plank a fixed inclined plane on which we have to push an object upwards along the slope ? What is an effort ? Is it a constant applied force? Why should the height to which object rises be limited ? Please help me understand the problem statement .