5. Exercises
From Mechanics
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</div>{{#NAVCONTENT:Answer|Answer 5.3|Solution a|Solution 5.3a|Solution b|Solution 5.3b}} | </div>{{#NAVCONTENT:Answer|Answer 5.3|Solution a|Solution 5.3a|Solution b|Solution 5.3b}} | ||
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| + | ===Exercise 5.4=== | ||
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| + | The diagram shows a block, of mass 20 kg, at rest on a rough slope inclined at 30<math>{}^\circ </math> to the horizontal. | ||
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| + | [[Image:E5.4.GIF]] | ||
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| + | a) Draw a diagram to show the forces acting on the block. | ||
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| + | b) Calculate the magnitude of each force acting on the block. | ||
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| + | c) Find the minimum value of the coefficient of friction between the block and the slope, correct to 2 significant figures. | ||
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| + | </div>{{#NAVCONTENT:Answer a|Answer 5.4a|Answer b|Answer 5.4b|Answer c|Answer 5.4c|Solution b|Solution 5.4b|Solution c|Solution 5.4c}} | ||
Revision as of 11:22, 10 September 2009
| Theory | Exercises |
Exercise 5.1
1. A particle of mass 20 kg is at rest on a rough slope inclined at 20
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 
Answer a | Answer b | Answer c | Answer d | Solution b | Solution c | Solution d
Loading...Exercise 5.2
An object, of mass 50 kg, is supported by two ropes, as shown in the diagram below. The diagram also shows how gravity acts on the object.
a) Find
b) Find
Exercise 5.3
Four cables are attached to the top of a telegraph pole. The tensions in these cables are shown in the diagram below. The forces acting on the pole are in equilibrium.
Assume that all the forces act in a horizontal plane.
(a) Express the force with magnitude Q in terms of the unit vectors 
Exercise 5.4
The diagram shows a block, of mass 20 kg, at rest on a rough slope inclined at 30
a) Draw a diagram to show the forces acting on the block.
b) Calculate the magnitude of each force acting on the block.
c) Find the minimum value of the coefficient of friction between the block and the slope, correct to 2 significant figures.
Answer a | Answer b | Answer c | Solution b | Solution c
