Explain what would happen to the magnitude of R if the van passed over the bridge at a higher speed. What would be the significance of any van speed greater than 15 m s–1? Support your answer with a calculation.
The answer says that when reaction force is 0 the the parcel is not in contact with the van floor , but why would this happen? I though that if the reaction force is 0 then the only force acting on the parcel is its weight vertically downwards ???
Aqa physics unit 4 June 11 q 1a watch
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Last edited by HG1; 01-04-2016 at 20:46.
- 01-04-2016 20:44
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- 03-04-2016 22:03
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Just quoting in Puddles the Monkey so she can move the thread if needed
Spoiler:Show(Original post by Puddles the Monkey)
- 03-04-2016 23:31
The reaction force (from netwons 3rd law) is the opposite force exerted. So when this is 0 the opposite forces (weight) also are 0