5. Exercises
From Mechanics
| Theory | Exercises |
Exercise 5.1
1. A particle of mass 20 kg is at rest on a rough slope inclined at 20 to the horizontal.
(a) Draw a diagram to show the forces acting on the particle.
(b) Find the magnitude of the normal reaction force acting on the
particle.
(c) Find the magnitude of the friction force acting on the particle.
(d) Find an inequality that , the coefficient of friction between the
particle and the plane, must satisfy.
Answer a
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Answer b
Answer c
Answer d
Solution b
Solution c
Solution d
