The discussion focuses on calculating the work required to pull a skier of mass 70.0 kg up a 30-degree slope over a distance of 60.0 meters using a motor-driven cable. The correct approach involves using the gravitational potential energy formula rather than incorrectly calculating force in Joules. The key equation for work is W = F (delta)r cos(theta), where the force must be calculated in Newtons, not Joules. The gravitational potential energy change provides a more straightforward solution to the problem.
PREREQUISITESStudents studying physics, particularly those focusing on mechanics, as well as educators looking for examples of work-energy principles in action.
It's all good up until this point:scurry18 said:Homework Statement
A skier of mass 70.0 kg is pulled up a slope by a motor-driven cable.
How much work is required to pull the skiera distance of 60.0m up a 30 degree slope (assumed frictionless) at a constant speed of 2.00 m/s?
Homework Equations
W=F (delta)r cos(theta)
The Attempt at a Solution
(delta)r= 60.0m
(theta)=30.0 degrees
Firstly force is measured in Newton's and not Joule's. Secondly, how did you calculate the force acting on the skier?scurry18 said:Force=60sin30=30 J