a brick is positioned first with its largest surface in contact with an inclined plane. the plane is tilted at an angle to the horizontal until the brick just begins to slide, and the angle,0, of the plane with the horizontal is measured. then the brick is turned on one of its narrow edges, the plane is tilted, and 0 is again measured. predict whether there will be a difference in these measured angles.
2007-10-28 15:42:09 · 3 answers · asked by aznedisonx 3 in Science & Mathematics ➔ Physics
Yes. The brick will slide at less of an angle in the second case. There is less area for drag to act on, and so less overall friction force. Thats why the principal of reducing friction in cars / train etc is to reduce the surface area in contact with the road / rails at any point.
Hope thats useful. =]
2007-10-28 15:46:41 · answer #1 · answered by Boltrig 2 · 0⤊ 1⤋
Expected No significant difference because:
The formula below doesn't contain a quantity on area.
Coefficient of friction = frictional force / Normal Force
2007-10-28 15:47:04 · answer #2 · answered by rene c 4 · 1⤊ 1⤋
Yes. When the air in the tyre is less driving is difficlt, because tyres will be more flat and the friction will be more.
2007-10-28 16:03:38 · answer #3 · answered by Joymash 6 · 0⤊ 1⤋