Posted by **Anonymous** on Tuesday, November 30, 2010 at 8:27am.

A 500 kg car moves along a horizontal road. The car moves with an acceleration 2.5 m/s2 by a driving force of 2500 N when the air resistance is 400 N. Find the friction of the tyre of the car.

- physics -
**bobpursley**, Tuesday, November 30, 2010 at 9:26am
Net force= m*acceleration

2500N-400-roadfriction= m*a

solve for road friction.

- physics -
**James**, Thursday, October 13, 2011 at 12:47am
You are driving a 2520.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 25.8 m. What is the coefficient of kinetic friction between your tires and the wet road?

- physics -
**James**, Thursday, October 13, 2011 at 12:48am
Joe wishes to hang a sign weighing 705 N so that cable A, attached to the store, makes a 30.0° angle, as shown below. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B?

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