2. Exercises - Versionshistorik

Taifun den 2 augusti 2010 kl. 10.28

Taifun — Mon, 02 Aug 2010 10:28:30 GMT

← Äldre version		Versionen från 2 augusti 2010 kl. 10.28
Rad 16:		Rad 16:
	b) Beräkna storleken på varje av dessa krafter.		b) Beräkna storleken på varje av dessa krafter.

-	</div>{{#NAVCONTENT:~~Answer~~\|Answer 2.1\|~~Solution~~ a\|Solution 2.1a\|~~Solution~~ b\|Solution 2.1b}}	+	</div>{{#NAVCONTENT:Svar\|Answer 2.1\|Lösning a\|Solution 2.1a\|Lösning b\|Solution 2.1b}}

	===Övning 2.2===		===Övning 2.2===

Taifun den 10 april 2010 kl. 12.36

Taifun — Sat, 10 Apr 2010 12:36:16 GMT

← Äldre version		Versionen från 10 april 2010 kl. 12.36
Rad 20:		Rad 20:
	===Övning 2.2===		===Övning 2.2===
	<div class="ovning">		<div class="ovning">
-	~~An aeroplane circles an airport at a constant speed~~. ~~Are the forces acting on the aeroplane in equilibrium~~? ~~Explain your answer~~.	+	Ett flygplan cirkulerar över en flygplats med konstant hastighet. Står krafterna som verkar på flygplanet i jämvikt? Motivera ditt svar.

	</div>{{#NAVCONTENT:Answer\|Answer 2.2\|Solution\|Solution 2.2}}		</div>{{#NAVCONTENT:Answer\|Answer 2.2\|Solution\|Solution 2.2}}


-	===~~Exercise~~ 2.3===	+	===Övning 2.3===
	<div class="ovning">		<div class="ovning">
	A helicopter, of mass 800 kg, is rising at a constant rate.		A helicopter, of mass 800 kg, is rising at a constant rate.
Rad 38:		Rad 38:


-	===~~Exercise~~ 2.4===	+	===Övning 2.4===
	<div class="ovning">		<div class="ovning">
	Calculate the magnitude of the force that gravity exerts on each of the following objects.		Calculate the magnitude of the force that gravity exerts on each of the following objects.

Taifun den 10 april 2010 kl. 12.31

Taifun — Sat, 10 Apr 2010 12:31:01 GMT

← Äldre version		Versionen från 10 april 2010 kl. 12.31
Rad 8:		Rad 8:


-	===~~Exercise~~ 2.1===	+	===Övning 2.1===
	<div class="ovning">		<div class="ovning">
-	~~A man, of mass~~ 75 kg~~, stands on a horizontal surface~~. ~~Assume that the man has two points of contact with the ground~~.	+	En person med massan 75 kg står på en horisontell yta. Anta att personen har två kontaktpunkter med ytan.

-	a) ~~Draw a diagram to show the forces acting on the man~~.	+	a) Rita en bild som visar de krafter som verkar på personen.

-	b) ~~Calculate the magnitude of each of these forces~~.	+	b) Beräkna storleken på varje av dessa krafter.

	</div>{{#NAVCONTENT:Answer\|Answer 2.1\|Solution a\|Solution 2.1a\|Solution b\|Solution 2.1b}}		</div>{{#NAVCONTENT:Answer\|Answer 2.1\|Solution a\|Solution 2.1a\|Solution b\|Solution 2.1b}}

-	===~~Exercise~~ 2.2===	+	===Övning 2.2===
	<div class="ovning">		<div class="ovning">
	An aeroplane circles an airport at a constant speed. Are the forces acting on the aeroplane in equilibrium? Explain your answer.		An aeroplane circles an airport at a constant speed. Are the forces acting on the aeroplane in equilibrium? Explain your answer.

Ian den 17 februari 2010 kl. 20.12

Ian — Wed, 17 Feb 2010 20:12:55 GMT

← Äldre version		Versionen från 17 februari 2010 kl. 20.12
Rad 47:		Rad 47:

	c) A lorry of mass 4.2 tonnes.		c) A lorry of mass 4.2 tonnes.
-
-

	</div>{{#NAVCONTENT:Answer\|Answer 2.4\|Solution a\|Solution 2.4a\|Solution b\|Solution 2.4b\|Solution c\|Solution 2.4c}}		</div>{{#NAVCONTENT:Answer\|Answer 2.4\|Solution a\|Solution 2.4a\|Solution b\|Solution 2.4b\|Solution c\|Solution 2.4c}}
Rad 56:		Rad 54:
	===Exercise 2.5===		===Exercise 2.5===
	<div class="ovning">		<div class="ovning">
-	~~An aeroplane circles an airport at~~ a ~~constant speed~~. ~~Are~~ the ~~forces acting on~~ the ~~aeroplane in equilibrium? Explain your answer~~.	+
		+	The weight of a body is 441 N. Calculate the mass of the body.

	</div>{{#NAVCONTENT:Answer\|Answer 2.5\|Solution\|Solution 2.5}}		</div>{{#NAVCONTENT:Answer\|Answer 2.5\|Solution\|Solution 2.5}}

Ian den 6 september 2009 kl. 09.56

Ian — Sun, 06 Sep 2009 09:56:53 GMT

← Äldre version		Versionen från 6 september 2009 kl. 09.56
Rad 59:		Rad 59:

	</div>{{#NAVCONTENT:Answer\|Answer 2.5\|Solution\|Solution 2.5}}		</div>{{#NAVCONTENT:Answer\|Answer 2.5\|Solution\|Solution 2.5}}
		+
		+
		+	===Exercise 2.6===
		+	<div class="ovning">
		+	A satellite, of mass 300 kg, orbits the earth at a height of 7000 km above the surface of the earth. Calculate the magnitude of the gravitational attraction that acts on the satellite.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.6\|Solution\|Solution 2.6}}
		+
		+
		+	===Exercise 2.7===
		+	<div class="ovning">
		+	The mass of the moon is <math>\text{7}.\text{38}\times \text{1}{{0}^{22}}</math> kg and the radius of the moon is <math>\text{1}.\text{73}\times \text{1}{{0}^{6}}</math> m. Determine the acceleration due to gravity on the moon, by considering the force that the moon exerts on a particle of mass 1 kg on its surface.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.7\|Solution\|Solution 2.7}}
		+
		+
		+	===Exercise 2.8===
		+	<div class="ovning">
		+
		+	A planet has a mass of
		+	<math>\text{5}\times \text{1}{{0}^{20}}</math>
		+	kg and on this planet the acceleration due to gravity is 3.2 ms-1. Determine the radius of the planet.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.8\|Solution\|Solution 2.8}}
		+
		+
		+	===Exercise 2.9===
		+	<div class="ovning">
		+	A man, of mass 80 kg, climbs 5000 m to the top of a mountain.
		+
		+	a) Use the Universal Law of Gravitation to calculate the gravitational attraction on the man.
		+
		+	b) Compare your answer to part (a) with the result given by using ''mg''.
		+
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.9\|Solution a\|Solution 2.9a\|Solution b\|Solution 2.9b}}
		+
		+
		+	===Exercise 2.10===
		+	<div class="ovning">
		+	The mass of Mars is <math>\text{6}.\text{42}\times \text{1}{{0}^{23}}</math> kg and the radius of the planet is 3400 km.
		+	What is the acceleration due to gravity on Mars?
		+
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.10\|Solution\|Solution 2.10}}

Ian den 6 september 2009 kl. 09.27

Ian — Sun, 06 Sep 2009 09:27:46 GMT

← Äldre version		Versionen från 6 september 2009 kl. 09.27
Rad 51:		Rad 51:

	</div>{{#NAVCONTENT:Answer\|Answer 2.4\|Solution a\|Solution 2.4a\|Solution b\|Solution 2.4b\|Solution c\|Solution 2.4c}}		</div>{{#NAVCONTENT:Answer\|Answer 2.4\|Solution a\|Solution 2.4a\|Solution b\|Solution 2.4b\|Solution c\|Solution 2.4c}}
		+
		+
		+
		+	===Exercise 2.5===
		+	<div class="ovning">
		+	An aeroplane circles an airport at a constant speed. Are the forces acting on the aeroplane in equilibrium? Explain your answer.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.5\|Solution\|Solution 2.5}}

Ian den 6 september 2009 kl. 09.23

Ian — Sun, 06 Sep 2009 09:23:56 GMT

← Äldre version		Versionen från 6 september 2009 kl. 09.23
Rad 35:		Rad 35:

	</div>{{#NAVCONTENT:Answer\|Answer 2.3\|Solution a\|Solution 2.3a\|Solution b\|Solution 2.3b}}		</div>{{#NAVCONTENT:Answer\|Answer 2.3\|Solution a\|Solution 2.3a\|Solution b\|Solution 2.3b}}
		+
		+
		+
		+	===Exercise 2.4===
		+	<div class="ovning">
		+	Calculate the magnitude of the force that gravity exerts on each of the following objects.
		+
		+	a) A car of mass 1250 kg.
		+
		+	b) A table tennis ball of mass 4 grams.
		+
		+	c) A lorry of mass 4.2 tonnes.
		+
		+
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.4\|Solution a\|Solution 2.4a\|Solution b\|Solution 2.4b\|Solution c\|Solution 2.4c}}

Ian den 6 september 2009 kl. 09.18

Ian — Sun, 06 Sep 2009 09:18:02 GMT

← Äldre version		Versionen från 6 september 2009 kl. 09.18
Rad 15:		Rad 15:

	b) Calculate the magnitude of each of these forces.		b) Calculate the magnitude of each of these forces.
-	\|}	+
	</div>{{#NAVCONTENT:Answer\|Answer 2.1\|Solution a\|Solution 2.1a\|Solution b\|Solution 2.1b}}		</div>{{#NAVCONTENT:Answer\|Answer 2.1\|Solution a\|Solution 2.1a\|Solution b\|Solution 2.1b}}

Rad 23:		Rad 23:

	</div>{{#NAVCONTENT:Answer\|Answer 2.2\|Solution\|Solution 2.2}}		</div>{{#NAVCONTENT:Answer\|Answer 2.2\|Solution\|Solution 2.2}}
		+
		+
		+	===Exercise 2.3===
		+	<div class="ovning">
		+	A helicopter, of mass 800 kg, is rising at a constant rate.
		+
		+	a) Are the forces acting on the helicopter in equilibrium?
		+
		+	b) Calculate the magnitude of the vertical lift force on the helicopter.
		+
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.3\|Solution a\|Solution 2.3a\|Solution b\|Solution 2.3b}}

Ian den 6 september 2009 kl. 09.09

Ian — Sun, 06 Sep 2009 09:09:12 GMT

← Äldre version		Versionen från 6 september 2009 kl. 09.09
Rad 17:		Rad 17:
	\|}		\|}
	</div>{{#NAVCONTENT:Answer\|Answer 2.1\|Solution a\|Solution 2.1a\|Solution b\|Solution 2.1b}}		</div>{{#NAVCONTENT:Answer\|Answer 2.1\|Solution a\|Solution 2.1a\|Solution b\|Solution 2.1b}}
		+
		+	===Exercise 2.2===
		+	<div class="ovning">
		+	An aeroplane circles an airport at a constant speed. Are the forces acting on the aeroplane in equilibrium? Explain your answer.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 2.2\|Solution\|Solution 2.2}}

Ian den 19 maj 2009 kl. 10.39

Ian — Tue, 19 May 2009 10:39:11 GMT

← Äldre version		Versionen från 19 maj 2009 kl. 10.39
Rad 8:		Rad 8:


-	===Exercise 3.1:1===	+	===Exercise 2.1===
	<div class="ovning">		<div class="ovning">
	A man, of mass 75 kg, stands on a horizontal surface. Assume that the man has two points of contact with the ground.		A man, of mass 75 kg, stands on a horizontal surface. Assume that the man has two points of contact with the ground.