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March 06, 2026, 02:57:58 am
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Author Topic: reaction  (Read 1107 times)  Share 

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itolduso

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reaction
« on: October 03, 2010, 10:35:26 pm »
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A 5 kg object is pulled up an inclined plane at 30deg to the horizontal at constant speed. The pulling rope is parallel to the inclined plane and has a tension of 40 newtons. Find the reaction force of the inclined plane on the object.
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Yitzi_K

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Re: reaction
« Reply #1 on: October 03, 2010, 10:51:40 pm »
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As the pulling force acting on the object is parallel to the plane, the reaction force will be equal to the component of the weight force that is perpendicular to the plane, i.e. which is
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2009: Legal Studies [41]
2010: English [45], Maths Methods [47], Economics [45], Specialist Maths [41], Accounting [48]

2010 ATAR: 99.60

itolduso

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Re: reaction
« Reply #2 on: October 03, 2010, 11:00:05 pm »
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the answer is 45.2
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Yitzi_K

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Re: reaction
« Reply #3 on: October 03, 2010, 11:45:29 pm »
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Hmmm something looks a little strange to me about this question. Given F=ma, if the object is moving at a constant speed, the net force must be equal to zero, yet it isn't. Unless I'm missing something here?
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2009: Legal Studies [41]
2010: English [45], Maths Methods [47], Economics [45], Specialist Maths [41], Accounting [48]

2010 ATAR: 99.60

chansthename

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Re: reaction
« Reply #4 on: October 05, 2010, 08:34:04 pm »
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yeah, as you have said it should just be the normal, maybe the answer is wrong.
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itolduso

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Re: reaction
« Reply #5 on: October 05, 2010, 09:41:03 pm »
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my teacher said 45.2 is right
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