5. Exercises - Revision history

Tek: Added video tab

Tek — Thu, 07 Apr 2011 12:44:03 GMT

Added video tab

←Older revision		Revision as of 12:44, 7 April 2011
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	{{Not selected tab\|[[5. Forces and equilibrium\|Theory]]}}		{{Not selected tab\|[[5. Forces and equilibrium\|Theory]]}}
	{{Selected tab\|[[5. Exercises\|Exercises]]}}		{{Selected tab\|[[5. Exercises\|Exercises]]}}
		+	{{Not selected tab\|[[5. Video\|Video]]}}
	\| style="border-bottom:1px solid #797979" width="100%"\|		\| style="border-bottom:1px solid #797979" width="100%"\|
	\|}		\|}

Ian at 10:21, 4 April 2010

Ian — Sun, 04 Apr 2010 10:21:35 GMT

←Older revision		Revision as of 10:21, 4 April 2010
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	Assume that all the forces act in a horizontal plane.		Assume that all the forces act in a horizontal plane.

-	(a) Express the force with magnitude ''Q'' in terms of the unit vectors <math>\mathbf{i}</math>	+	a) Express the force with magnitude ''Q'' in terms of the unit vectors <math>\mathbf{i}</math>
	and <math>\mathbf{j}</math>.		and <math>\mathbf{j}</math>.
-	(b) Find ''Q'' and the angle <math>\alpha </math>.	+
		+	b) Find ''Q'' and the angle <math>\alpha </math>.

Ian at 15:43, 2 April 2010

Ian — Fri, 02 Apr 2010 15:43:25 GMT

←Older revision		Revision as of 15:43, 2 April 2010
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-	</div>{{#NAVCONTENT:Answer a\|Answer 5.1a\|Answer b\|Answer 5.1b\|Answer c\|Answer 5.1c\|Answer d\|Answer 5.1d\|Solution b\|Solution 5.1b\|Solution c\|Solution 5.1c\|Solution d\|Solution 5.1d}}	+	</div>{{#NAVCONTENT:Answer a\|Answer 5.1aNew\|Answer b\|Answer 5.1b\|Answer c\|Answer 5.1c\|Answer d\|Answer 5.1d\|Solution b\|Solution 5.1b\|Solution c\|Solution 5.1c\|Solution d\|Solution 5.1d}}

	===Exercise 5.2===		===Exercise 5.2===

Ian at 12:53, 10 September 2009

Ian — Thu, 10 Sep 2009 12:53:20 GMT

←Older revision		Revision as of 12:53, 10 September 2009
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	{\| border="0" cellspacing="0" cellpadding="0" height="30" width="100%"		{\| border="0" cellspacing="0" cellpadding="0" height="30" width="100%"
	\| style="border-bottom:1px solid #797979" width="5px" \|		\| style="border-bottom:1px solid #797979" width="5px" \|
-	{{Not selected tab\|[[5.Forces and equilibrium\|Theory]]}}	+	{{Not selected tab\|[[5. Forces and equilibrium\|Theory]]}}
	{{Selected tab\|[[5. Exercises\|Exercises]]}}		{{Selected tab\|[[5. Exercises\|Exercises]]}}
	\| style="border-bottom:1px solid #797979" width="100%"\|		\| style="border-bottom:1px solid #797979" width="100%"\|

Ian at 12:42, 10 September 2009

Ian — Thu, 10 Sep 2009 12:42:06 GMT

←Older revision		Revision as of 12:42, 10 September 2009
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	</div>{{#NAVCONTENT:Answer\|Answer 5.8\|Solution\|Solution 5.8}}		</div>{{#NAVCONTENT:Answer\|Answer 5.8\|Solution\|Solution 5.8}}
		+
		+
		+
		+	===Exercise 5.9===
		+	<div class="ovning">
		+	The diagram shows an object of mass 50 kg. Find the tension in each of the supporting cables.
		+
		+
		+	[[Image:E5.9.GIF]]
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 5.9\|Solution\|Solution 5.9}}

Ian at 12:34, 10 September 2009

Ian — Thu, 10 Sep 2009 12:34:00 GMT

←Older revision		Revision as of 12:34, 10 September 2009
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		+	</div>{{#NAVCONTENT:Answer a\|Answer 5.7a\|Answer b\|Answer 5.7b\|Solution a\|Solution 5.7a\|Solution b\|Solution 5.7b}}


-	</div>{{#NAVCONTENT:Answer a\|Answer 5.~~7a\|Answer b\|Answer 5.7b\|Solution a\|Solution 5.7a~~\|Solution b\|Solution 5.7b}}	+
		+	===Exercise 5.8===
		+	<div class="ovning">
		+	The diagram shows an object of mass 50 kg. Find the tension in each of the supporting cables.
		+
		+	[[Image:E5.8.GIF]]
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 5.8\|Solution\|Solution 5.8}}

Ian at 12:11, 10 September 2009

Ian — Thu, 10 Sep 2009 12:11:35 GMT

←Older revision		Revision as of 12:11, 10 September 2009
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	</div>{{#NAVCONTENT:Answer a\|Answer 5.6a\|Answer b\|Answer 5.6b\|Answer c\|Answer 5.6c\|Solution c\|Solution 5.6c}}		</div>{{#NAVCONTENT:Answer a\|Answer 5.6a\|Answer b\|Answer 5.6b\|Answer c\|Answer 5.6c\|Solution c\|Solution 5.6c}}
		+
		+
		+	===Exercise 5.7===
		+	<div class="ovning">
		+	A sphere, of mass 40 kg, is supported, in equilibrium, by two strings and a spring as shown in the diagram below. The tension in the horizontal string is 45 N.
		+
		+	[[Image:E5.7.GIF]]
		+
		+	a) Find the tension, ''T'', in the other string.
		+
		+	b) Find the magnitude of the force exerted by the spring and state whether the spring is in tension or compression.
		+
		+
		+
		+
		+	</div>{{#NAVCONTENT:Answer a\|Answer 5.7a\|Answer b\|Answer 5.7b\|Solution a\|Solution 5.7a\|Solution b\|Solution 5.7b}}

Ian at 12:01, 10 September 2009

Ian — Thu, 10 Sep 2009 12:01:04 GMT

←Older revision		Revision as of 12:01, 10 September 2009
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	</div>{{#NAVCONTENT:Answer a\|Answer 5.5a\|Answer b\|Answer 5.5b\|Answer c\|Answer 5.5c\|Answer d\|Answer 5.5d\|Solution a\|Solution 5.5a\|Solution b\|Solution 5.5b\|Solution c\|Solution 5.5c\|Solution d\|Solution 5.5d}}		</div>{{#NAVCONTENT:Answer a\|Answer 5.5a\|Answer b\|Answer 5.5b\|Answer c\|Answer 5.5c\|Answer d\|Answer 5.5d\|Solution a\|Solution 5.5a\|Solution b\|Solution 5.5b\|Solution c\|Solution 5.5c\|Solution d\|Solution 5.5d}}
		+
		+
		+	===Exercise 5.6===
		+	<div class="ovning">
		+
		+	A skier, of mass 72 kg, travels down a slope, at 20<math>{}^\circ </math> to the horizontal, at a constant speed and moves in a straight line.
		+
		+	a) Are the forces acting on the skier in equilibrium ? Give reasons for your answer.
		+
		+	b) Draw a diagram to show the forces acting on the skier.
		+
		+	c) If the coefficient of friction between the skier and the snow is 0.2, find the magnitude of the air resistance force acting on the skier.
		+
		+
		+	</div>{{#NAVCONTENT:Answer a\|Answer 5.6a\|Answer b\|Answer 5.6b\|Answer c\|Answer 5.6c\|Solution c\|Solution 5.6c}}

Ian at 11:35, 10 September 2009

Ian — Thu, 10 Sep 2009 11:35:24 GMT

←Older revision		Revision as of 11:35, 10 September 2009
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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}}		</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}}
		+
		+	===Exercise 5.5===
		+	<div class="ovning">
		+
		+	A tank, of mass 500 kg, is being pulled across rough horizontal ground. The coefficient of friction between the tank and the ground is 0.3. A force is applied to the tank as shown in the diagram.
		+
		+	[[Image:E5.5.GIF]]
		+
		+	The tank slides when the force is applied.
		+
		+	a) Express the 5000N force as a vector in terms of the unit vectors <math>\mathbf{i}</math> and <math>\mathbf{j}</math>.
		+
		+	b) Find the magnitude of the normal reaction force acting on the tank.
		+
		+	c) Calculate the magnitude of the friction force acting on the tank.
		+
		+	d) Find the magnitude of the resultant force on the tank.
		+
		+
		+	</div>{{#NAVCONTENT:Answer a\|Answer 5.5a\|Answer b\|Answer 5.5b\|Answer c\|Answer 5.5c\|Answer d\|Answer 5.5d\|Solution a\|Solution 5.5a\|Solution b\|Solution 5.5b\|Solution c\|Solution 5.5c\|Solution d\|Solution 5.5d}}

Ian at 11:22, 10 September 2009

Ian — Thu, 10 Sep 2009 11:22:41 GMT

←Older revision		Revision as of 11:22, 10 September 2009
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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}}
		+
		+
		+
		+
		+	===Exercise 5.4===
		+	<div class="ovning">
		+
		+	The diagram shows a block, of mass 20 kg, at rest on a rough slope inclined at 30<math>{}^\circ </math> to the horizontal.
		+
		+	[[Image:E5.4.GIF]]
		+
		+	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.
		+
		+
		+	</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}}

←Older revision		Revision as of 12:44, 7 April 2011
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	{{Not selected tab\|[[5. Forces and equilibrium\|Theory]]}}		{{Not selected tab\|[[5. Forces and equilibrium\|Theory]]}}
	{{Selected tab\|[[5. Exercises\|Exercises]]}}		{{Selected tab\|[[5. Exercises\|Exercises]]}}
		+	{{Not selected tab\|[[5. Video\|Video]]}}
	\| style="border-bottom:1px solid #797979" width="100%"\|		\| style="border-bottom:1px solid #797979" width="100%"\|
	\|}		\|}

←Older revision		Revision as of 12:53, 10 September 2009
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	{\| border="0" cellspacing="0" cellpadding="0" height="30" width="100%"		{\| border="0" cellspacing="0" cellpadding="0" height="30" width="100%"
	\| style="border-bottom:1px solid #797979" width="5px" \|		\| style="border-bottom:1px solid #797979" width="5px" \|
-	{{Not selected tab\|[[5.Forces and equilibrium\|Theory]]}}	+	{{Not selected tab\|[[5. Forces and equilibrium\|Theory]]}}
	{{Selected tab\|[[5. Exercises\|Exercises]]}}		{{Selected tab\|[[5. Exercises\|Exercises]]}}
	\| style="border-bottom:1px solid #797979" width="100%"\|		\| style="border-bottom:1px solid #797979" width="100%"\|