15. Exercises - Versionshistorik

Ian den 11 november 2009 kl. 17.18

Ian — Wed, 11 Nov 2009 17:18:54 GMT

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Rad 104:		Rad 104:

	c) Find the angle between the initial and final velocities of the car.		c) Find the angle between the initial and final velocities of the car.
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	</div>{{#NAVCONTENT:Answer a\|Answer 15.8a\|Answer b\|Answer 15.8b\|Answer c\|Answer 15.8c\|Solution a\|Solution 15.8a\|Solution b\|Solution 15.8b\|Solution c\|Solution 15.8c}}		</div>{{#NAVCONTENT:Answer a\|Answer 15.8a\|Answer b\|Answer 15.8b\|Answer c\|Answer 15.8c\|Solution a\|Solution 15.8a\|Solution b\|Solution 15.8b\|Solution c\|Solution 15.8c}}
		+
		+
		+
		+	===Exercise 15.9===
		+	<div class="ovning">
		+
		+	A particle, of mass m, is travelling at a of speed 4u. An impulse of magnitude kmu acts on the particle, so that it now moves perpendicular to its original path at a speed 2u.
		+
		+	a) Find k.
		+
		+	b) Find the angle between the impulse and the initial velocity of the particle.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 15.9\|Solution a\|Solution 15.9a\|Solution b\|Solution 15.9b}}

Ian den 11 november 2009 kl. 17.15

Ian — Wed, 11 Nov 2009 17:15:47 GMT

← Äldre version		Versionen från 11 november 2009 kl. 17.15
Rad 92:		Rad 92:

	</div>{{#NAVCONTENT:Answer\|Answer 15.7\|Solution a\|Solution 15.7a\|Solution b\|Solution 15.7b}}		</div>{{#NAVCONTENT:Answer\|Answer 15.7\|Solution a\|Solution 15.7a\|Solution b\|Solution 15.7b}}
		+
		+
		+	===Exercise 15.8===
		+	<div class="ovning">
		+
		+	A car, of mass 1250 kg is moving at 15 <math>\text{m}{{\text{s}}^{-1}}</math>, when it is hit by another vehicle. The other vehicle exerts a force of magnitude 800 N for 3 seconds. This force is perpendicular to the original path of the car.
		+
		+	a) Calculate the magnitude of the impulse on the car.
		+
		+	b) Find the speed of the car after the collision.
		+
		+	c) Find the angle between the initial and final velocities of the car.
		+
		+
		+
		+	</div>{{#NAVCONTENT:Answer a\|Answer 15.8a\|Answer b\|Answer 15.8b\|Answer c\|Answer 15.8c\|Solution a\|Solution 15.8a\|Solution b\|Solution 15.8b\|Solution c\|Solution 15.8c}}

Ian den 11 november 2009 kl. 17.12

Ian — Wed, 11 Nov 2009 17:12:24 GMT

← Äldre version		Versionen från 11 november 2009 kl. 17.12
Rad 85:		Rad 85:
	A particle, of mass 2kg, is sliding at 12 <math>\text{m}{{\text{s}}^{-1}}</math> when it is hits a wall. After hitting the wall, the particle moves at a speed of 6 <math>\text{m}{{\text{s}}^{-1}}</math> at right angles to its original direction of motion.		A particle, of mass 2kg, is sliding at 12 <math>\text{m}{{\text{s}}^{-1}}</math> when it is hits a wall. After hitting the wall, the particle moves at a speed of 6 <math>\text{m}{{\text{s}}^{-1}}</math> at right angles to its original direction of motion.

-	</div>{{#NAVCONTENT:Answer\|Answer 15.7\|Solution\|Solution 15.7}}	+	a) Find the magnitude of the impulse on the particle.
		+
		+	b) Given that the impulse is perpendicular to the wall, find the angle between the wall and the initial direction of motion of the particle..
		+
		+
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 15.7\|Solution a\|Solution 15.7a\|Solution b\|Solution 15.7b}}

Ian den 11 november 2009 kl. 17.09

Ian — Wed, 11 Nov 2009 17:09:08 GMT

← Äldre version		Versionen från 11 november 2009 kl. 17.09
Rad 74:		Rad 74:

	b) Given that the car takes 3 seconds to come to rest, find the average resultant force on the car.		b) Given that the car takes 3 seconds to come to rest, find the average resultant force on the car.
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	</div>{{#NAVCONTENT:Answer\|Answer 15.6\|Solution a\|Solution 15.6a\|Solution b\|Solution 15.6b}}		</div>{{#NAVCONTENT:Answer\|Answer 15.6\|Solution a\|Solution 15.6a\|Solution b\|Solution 15.6b}}
		+
		+
		+
		+	===Exercise 15.7===
		+	<div class="ovning">
		+
		+	A particle, of mass 2kg, is sliding at 12 <math>\text{m}{{\text{s}}^{-1}}</math> when it is hits a wall. After hitting the wall, the particle moves at a speed of 6 <math>\text{m}{{\text{s}}^{-1}}</math> at right angles to its original direction of motion.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 15.7\|Solution\|Solution 15.7}}

Ian den 11 november 2009 kl. 17.06

Ian — Wed, 11 Nov 2009 17:06:57 GMT

← Äldre version		Versionen från 11 november 2009 kl. 17.06
Rad 64:		Rad 64:

	</div>{{#NAVCONTENT:Answer\|Answer 15.5\|Solution\|Solution 15.5}}		</div>{{#NAVCONTENT:Answer\|Answer 15.5\|Solution\|Solution 15.5}}
		+
		+
		+	===Exercise 15.6===
		+	<div class="ovning">
		+
		+	A car, of mass 1200 kg, is moving at 8 <math>\text{m}{{\text{s}}^{-1}}</math> along a straight road when the brakes are applied until it comes to rest.
		+
		+	a) Find the impulse on the car.
		+
		+	b) Given that the car takes 3 seconds to come to rest, find the average resultant force on the car.
		+
		+
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 15.6\|Solution a\|Solution 15.6a\|Solution b\|Solution 15.6b}}

Ian den 11 november 2009 kl. 16.43

Ian — Wed, 11 Nov 2009 16:43:42 GMT

← Äldre version		Versionen från 11 november 2009 kl. 16.43
Rad 56:		Rad 56:

	</div>{{#NAVCONTENT:Answer a\|Answer 15.4a\|Answer b\|Answer 15.4b\|Answer c\|Answer 15.4c\|Solution a\|Solution 15.4a\|Solution b\|Solution 15.4b\|Solution c\|Solution 15.4c}}		</div>{{#NAVCONTENT:Answer a\|Answer 15.4a\|Answer b\|Answer 15.4b\|Answer c\|Answer 15.4c\|Solution a\|Solution 15.4a\|Solution b\|Solution 15.4b\|Solution c\|Solution 15.4c}}
		+
		+
		+	===Exercise 15.5===
		+	<div class="ovning">
		+
		+	A squash ball, of mass ??? of grams, hits a wall travelling horizontally at 9 <math>\text{m}{{\text{s}}^{-1}}</math> and rebounds at 7 <math>\text{m}{{\text{s}}^{-1}}</math>. Assume that the motion is perpendicular to the wall.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 15.5\|Solution\|Solution 15.5}}

Ian den 11 november 2009 kl. 16.41

Ian — Wed, 11 Nov 2009 16:41:06 GMT

← Äldre version		Versionen från 11 november 2009 kl. 16.41
Rad 19:		Rad 19:


-	</div>{{#NAVCONTENT:Answer a\|Answer 15.1a\|Answer b\|Answer 15.1b\|Answer c\|Answer 15.1c\|Solution a\|Solution 15.1a\|Solution b\|Solution 15.1b\|Solution c\|Solution 15.1}}	+	</div>{{#NAVCONTENT:Answer a\|Answer 15.1a\|Answer b\|Answer 15.1b\|Answer c\|Answer 15.1c\|Solution a\|Solution 15.1a\|Solution b\|Solution 15.1b\|Solution c\|Solution 15.1c}}


Rad 36:		Rad 36:

	</div>{{#NAVCONTENT:Answer\|Answer 15.3\|Solution\|Solution 15.3}}		</div>{{#NAVCONTENT:Answer\|Answer 15.3\|Solution\|Solution 15.3}}
		+
		+
		+
		+	===Exercise 15.4===
		+	<div class="ovning">
		+
		+	A ball is released from a height of 2 m and rebounds to a height of 1.4 m. Assume that no air resistance acts on the ball as it moves.
		+
		+
		+	Use constant acceleration equations to find:
		+
		+	a) The speed of the ball when it hits the ground.
		+
		+	b) The rebound speed of the ball.
		+
		+	c) Given that the mass of the ball is 0.08 kg, calculate the magnitude of the impulse on the ball while it is in contact with the ground.
		+
		+
		+
		+	</div>{{#NAVCONTENT:Answer a\|Answer 15.4a\|Answer b\|Answer 15.4b\|Answer c\|Answer 15.4c\|Solution a\|Solution 15.4a\|Solution b\|Solution 15.4b\|Solution c\|Solution 15.4c}}

Ian den 11 november 2009 kl. 16.36

Ian — Wed, 11 Nov 2009 16:36:47 GMT

← Äldre version		Versionen från 11 november 2009 kl. 16.36
Rad 28:		Rad 28:

	</div>{{#NAVCONTENT:Answer\|Answer 15.2\|Solution\|Solution 15.2}}		</div>{{#NAVCONTENT:Answer\|Answer 15.2\|Solution\|Solution 15.2}}
		+
		+
		+	===Exercise 15.3===
		+	<div class="ovning">
		+
		+	A van, of mass of 4 tonnes, is travelling at 25 <math>\text{m}{{\text{s}}^{-1}}</math> along a straight road. As it approaches a traffic light it slows down to 8 <math>\text{m}{{\text{s}}^{-1}}</math>. Calculate the magnitude of the impulse on the van.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 15.3\|Solution\|Solution 15.3}}

Ian den 11 november 2009 kl. 16.24

Ian — Wed, 11 Nov 2009 16:24:32 GMT

← Äldre version		Versionen från 11 november 2009 kl. 16.24
Rad 19:		Rad 19:


-	</div>{{#NAVCONTENT:Answer a\|Answer 15.1a\|Answer b\|Answer 15.1b\|Answer c\|Answer 15.1c\|Solution a\|Solution 5.6a\|Solution b\|Solution 5.6b\|Solution c\|Solution 5.6c}}	+	</div>{{#NAVCONTENT:Answer a\|Answer 15.1a\|Answer b\|Answer 15.1b\|Answer c\|Answer 15.1c\|Solution a\|Solution 15.1a\|Solution b\|Solution 15.1b\|Solution c\|Solution 15.1}}
		+
		+
		+	===Exercise 15.2===
		+	<div class="ovning">
		+
		+	A ball, of mass 100 grams, is travelling horizontally at 8 <math>\text{m}{{\text{s}}^{-1}}</math> when it hits a wall and rebounds at 5 <math>\text{m}{{\text{s}}^{-1}}</math>. Assume that all the motion is perpendicular to the wall. Calculate the magnitude of the impulse on the ball.
		+
		+	</div>{{#NAVCONTENT:Answer\|Answer 15.2\|Solution\|Solution 15.2}}

Ian den 11 november 2009 kl. 16.11

Ian — Wed, 11 Nov 2009 16:11:52 GMT

← Äldre version		Versionen från 11 november 2009 kl. 16.11
Rad 6:		Rad 6:
	\| style="border-bottom:1px solid #797979" width="100%"\|		\| style="border-bottom:1px solid #797979" width="100%"\|
	\|}		\|}
		+
		+	===Exercise 15.1===
		+	<div class="ovning">
		+
		+	Calculate the momentum of
		+
		+	a) a train, of mass 120 tonnes, travelling at 40 <math>\text{m}{{\text{s}}^{-1}}</math>,
		+
		+	b) a table tennis ball, of mass 3 grams, travelling at 4 <math>\text{m}{{\text{s}}^{-1}}</math>,
		+
		+	c) a car, of mass 1200 kg, travelling at 36 kmph.
		+
		+
		+	</div>{{#NAVCONTENT:Answer a\|Answer 15.1a\|Answer b\|Answer 15.1b\|Answer c\|Answer 15.1c\|Solution a\|Solution 5.6a\|Solution b\|Solution 5.6b\|Solution c\|Solution 5.6c}}