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2 articles trouvés pour ce sujet.
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Two lorries approaching an intersection |
2015-05-15 |
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Nuraini pose la question :
Two straight roads intersect at the right angles. Lorry A, moving on one of the roads,
Approaches the intersection at 50mi/h and lorry B, moving on the other roads, approaches the intersection at 20mi/h.
At what rate is the distance between the lorry changing when A is 0.4 mile from the intersection and B is 0.3 mile from the intersection?
Penny Nom lui répond. |
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The force of a 5000 tonne lorry |
2004-10-27 |
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Aaron pose la question :
A 50 tonne lorry is parked on a slope with a gradient of 4%.
Due to the self weight of the lorry, what is the force
* acting down the slope
* acting normal (at right angles) to the slope
Penny Nom lui répond. |
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