Question

How do you solve a problem for frictional work on an incline with only the mass, angle, beginning and end velocity and height?

Answer 1

How do you solve a problem for frictional work on an incline with only the mass, angle, beginning and end velocity and height?

Solution

According to the energy conservation law:

$$K _ {1} = A _ {F r} + K _ {2} + E _ {p}$$ $$\frac {m V _ {1} ^ {2}}{2} = A _ {F r} + \frac {m V _ {2} ^ {2}}{2} + m g h$$ $$A _ {F r} = \frac {m V _ {1} ^ {2}}{2} - \frac {m V _ {2} ^ {2}}{2} - m g h$$