1. A snowboarder of mass 60 kg is at rest on

Question

the top of a sand dune. The coefficients of
static and kinetic friction are 0.55 and 0.4675,
respectively.

60 kg
μk = 0.4675
μs = 0.55
�
What is the angle � the incline must exceed
so that the snowboarder starts sliding? The
acceleration of gravity is 9.8 m/s2 .
Answer in units of ◦.

2. What is the acceleration down the incline if
� = 35 ◦, exceeding the value found in the
previous question?

Please help. I am so confused.

Answer 1

See previous post: Wed, 11-2-16, 8:37 PM.