5. Exercises
Förberedande Mekanik
(Skillnad mellan versioner)
| Rad 11: | Rad 11: | ||
| - | 1. A particle of mass 20 kg is at rest on a rough slope inclined at | + | 1. A particle of mass 20 kg is at rest on a rough slope inclined at 20<math>{}^\circ </math> 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. | particle. | ||
| - | + | ||
| - | + | c) Find the magnitude of the friction force acting on the particle. | |
| + | |||
| + | d) Find an inequality that <math>\mu </math>, the coefficient of friction between the | ||
particle and the plane, must satisfy. | particle and the plane, must satisfy. | ||
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Versionen från 9 september 2009 kl. 18.06
| Theory | Exercises |
Exercise 5.1
1. A particle of mass 20 kg is at rest on a rough slope inclined at 20\displaystyle {}^\circ 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 \displaystyle \mu , the coefficient of friction between the particle and the plane, must satisfy.
Answer a
Hämtar...
Answer b
Answer c
Answer d
Solution b
Solution c
Solution d
