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Challenge: When a car turns to the left, why do passengers slide to the right?

Challenge: When a car turns to the left, why do passengers slide to the right?
How can circular motion be accelerated when speed is constant?
Four variables are involved in circular motion:
1. ______ 2. ______ 3. ______ 4. ______ 5. ______
r ∝ ______
In words: Radius is ______ proportional to ______
Fc ∝ ______
In words: Centripetal force is ______ proportional to ______
m ∝ ______
In words: Mass is ______ proportional to ______
Fc = ______ ac = ______
Problem Set #1 (1-2) (on back)
________ furnishes most of the Fc to make cars turn in a curve.
Banking a curve adds to the Fc due to the ______ component of the ______ force exerted by the road on the car.
Use the ones method to solve: If speed limit around a curve is ______ mph, and your velocity is 60 mph, the radius of the circle will be ______ times greater.

Answer

Challenge: Passengers slide to the right due to inertia, which causes them to continue moving in a straight line while the car turns left.

How can circular motion be accelerated when speed is constant? Circular motion can be accelerated by changing the direction of the velocity vector, even if the speed remains constant.

Four variables are involved in circular motion:

  1. Velocity
  2. Radius
  3. Centripetal Force
  4. Mass
  5. Acceleration

r ∝ ______
In words: Radius is inversely proportional to centripetal force.

Fc ∝ ______
In words: Centripetal force is directly proportional to the square of the velocity and inversely proportional to the radius.

m ∝ ______
In words: Mass is directly proportional to centripetal force.

Fc = mv²/r
ac = v²/r

Problem Set #1 (1-2) (on back)
Friction furnishes most of the Fc to make cars turn in a curve.
Banking a curve adds to the Fc due to the horizontal component of the normal force exerted by the road on the car.

Use the ones method to solve: If speed limit around a curve is 30 mph, and your velocity is 60 mph, the radius of the circle will be 4 times greater.

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