1. Warm Up A ski hill has a slope of 40 degrees. If the coefficient of friction between a skier’s skis and the snow is 0.1 what will be the acceleration of the skier (mass = 60 kg)? A) Draw a Free body Diagram B) Find the Normal Force C) Find the x component of gravity D) Find the force of friction E) Find the acceleration down the slope

2. Homework Worksheet

3. Tension Force in/along a rope. Whenever a rope is supporting/pulling an object we call that F push or F pull T for tension

4. Example What is the tension in a rope handing straight down from the ceiling supporting a 100 kg mass?

5. Practice For the following situations draw an FBD and find the tension in the rope. Hanging straight down the rope supports a mass of: A) 10 kg B) 55 kg C) 40000 kg D) 67.1 kg

6. Example A penguin is pulled along a frictionless, icy surface. The mass of the penguin is 4 kg, and it’s acceleration is 2 m/s2. A) Draw a FBD B) What is the tension in the rope pulling the penguin?

7. Practice A Polar Bear is pulled along a frictionless, icy surface. The mass of the Polar Bear is 235 kg, and its acceleration is 0.5 m/s2. A) Draw a FBD of the situation B) What is the tension in the rope pulling the polar bear?

8. Worksheet Question 1

9. Review for Quiz Forces Newton’s Laws Gravity Vectors Tension Friction Inclines

10. Practice Problems Pg 103 AP 66, 69, 71, 81

11. Homework worksheet