I need help with this worksheet

Circular Motion 2 Name: ___________________________________ Period: _____

0, 0.323, 0.323, 0.363, 0.366, 0.653, 1.19, 2.67, 2.73, 6.4, 9.80, 9.90, 22.8, 539, 539, 960, 1250, 1470, 1470,

1. A bicyclist (150 kg) on a flat level road turns a corner of radius 15 m at 9.8m/s. Do the following steps to determine what the minimum coefficient of friction between the tires and the road is for the bike not to skid.

1. 1. What is the acceleration of the cyclist?

   2. What is the force of friction between the tires and the road?

   3. What is the force of gravity on the cyclist?

   4. What is the normal force the road exerts on the cyclist?

   5. What is the minimum coefficient of friction needed for the bike not to skid?

1. In the gravitron ride at the fair, people are in a drum with vertical walls of radius 4.3 m. The coefficient of friction between the rider (55 kg) and the wall is 0.43. Do the following steps to determine frequency of rotation of the drum required for the rider no to slip down the wall and off the ride when he floor is removed.

1. 1. What is the gravitational force on the rider?

   2. What is the frictional force on the rider?

   3. What is the normal force the wall exerts on the rider?

   4. What is the acceleration of the rider?

   5. At what speed is the rider moving?

   6. What is the period of the motion?

   7. What is the frequency of the motion?

1. A hot-wheels car (33g) starts at rest and zooms frictionlessly down a ramp toward a loop-de-loop of diameter 29 cm. Do the following steps to determine the minimum height (h) of the starting point above the bottom of the loop for the car to make it around the loop.

1. 1. What is the gravitational force on the car?

   2. What is the normal force of the track on the car at the top of the loop when the car barely makes the loop without leaving the track?

1. 1. What is the total downward force on the car at the top of the loop?

   2. What is the acceleration of the car at the top of the loop?

   3. What speed does the car have at the top of the loop?

   4. What speed does the car have at the bottom of the loop?

   5. What is the height of the starting position above the bottom of the loop?