In this diagram the up wards and downwards forces are the same. If a 10N weight were to be placed to the beam the trestles would have to increase their upwards force by 10N
Thursday 21 February 2013
1.28 understand that the upward forces on a light beam, supported at its ends, vary with the position of a heavy object placed on the beam
This means you need to understand that if you have say a plank of wood being held in balance by springs pushing up at the ends and you put a weight on the beam, the springs would have to exert more force as they need to equal the downward force.
In this diagram the up wards and downwards forces are the same. If a 10N weight were to be placed to the beam the trestles would have to increase their upwards force by 10N
In this diagram the up wards and downwards forces are the same. If a 10N weight were to be placed to the beam the trestles would have to increase their upwards force by 10N
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ReplyDeleteThank you Angelica, best of luck :)
DeleteThis is AMAZINGLY helpful thank you so much!!!!!
ReplyDeleteHahaha, I'm glad you find it helpful ;)
Deletehey hannah i am doing my year 9 end of year exam in 1 week. there are no points on the three laws of newton on my sylabus. any help?
ReplyDeleteThe first law is - unless a resultant force acts on an object it will continue to move in a straight line at a constant speed or remain at rest.
ReplyDeleteThe second - the rate of change of momentum of a body is proportional to the force acting on it (you can use the equation force = change in momentum/time). The third is for every action there is an equal and opposite reaction. I know I'm not Hannah but hope this helps!
Thank you so much for doing this becky :)) I hope it helps scarlette too!
DeleteYou're the best Hannah!
ReplyDeleteWhat if the object is placed in a different position? (not directly in the middle)
ReplyDeleteI know this is years after but the upwards force on the side the object is closest to would be larger than that on the other side. They would still total the weight of the object though.
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DeleteWell, 7 hours before my exam, and this website has been a life saver, thank you Hannah
ReplyDeletehannah the picture doesnt load its not working can u reupload it please :(
ReplyDeletethank you so much haha I read this sentence for an hour in my revision book thinking it was talking about a beam of light and eventually found your explanation which makes so much more sense!
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