Question

Learning Goal:

To practice Problem-Solving Strategy 7.1 Work and kinetic energy.

(Figure 1)Marjan, a skier of mass m, coasts a distance son level snow to a stop from a speed of v, as depicted in the figure. Use the work-energy principle to find the coefficient of kinetic friction ?k between the skis and the snow.

What is the net force on the skier in the x direction?

Enter an expression for the net force in terms of some or all of the variables given in the problem.

Hint 1. Formula for kinetic friction

The magnitude of the frictional force acting on an object in motion is given by the equation fk=?kn, where ?k is the coefficient of kinetic friction and n is the magnitude of the normal force acting on the object.

Hint 2. Find the normal force

What is the magnitude of the normal force acting on the skier?

Enter an expression for the normal force in terms of the variables given in the problem.

Answer 1

Sal Na nna