Question

A sled of mass 45.3 kg is pulled along flat, snow-covered ground. The static friction coefficient is 0.28, and the kinetic friction coefficient is 0.08. What force will be needed to start the sled moving?

Answer 1

To find the force needed to start the sled moving, the maximum static friction force can be calculated using the equation F_static max = μ_static × N , where μ_static is the static friction coefficient and N is the normal force.

Step-by-step explanation:

To find the force needed to start the sled moving, we need to consider the static friction between the sled and the snow-covered ground. The maximum static friction force can be calculated using the equation:

Fstatic max = μstatic × N

Where μstatic is the static friction coefficient and N is the normal force. Since the sled is on a flat surface, the normal force is equal to the weight of the sled, which can be calculated using:

N = m × g

Substituting the given values into the equations, we can calculate the force needed to start the sled moving.