Question

All objects moving in a circle experience a centripetal force. The form of centripetal force depends on the object in circular motion and the force causing the circular movement. Which of the following describes the correct centripetal force acting on an object moving in a circle?
The force of air resistance as a rollercoaster performs a loop on a track.
The force of friction as a car drives around a corner at constant speed.
The force of gravity as a ball on a string is spun horizontally in a circle.
The force of inertia as a person spins on a ride at an amusement park.

Answer 1

Answer:

The force of friction as a car drives around a corner at constant speed

Explanation:

The centripetal force is an external resultant force that is directed towards the center of circle which object is rotated and perpendicular to the direction of velocity.

The force of friction is always towards the center of the arc with car is turned and it is always perpendicular to the direction of motion.

We also can derive equation,

$v^{2} = μrg$ by considering friction as the centripetal force.

Check the attachment for workings.

Download pdf