1. Exam II Review
Lecture 15

2. Review Problem
Macie pulls a 40 kg rolling trunk by a strap angled at 30° from the horizontal. She pulls with a force of 40 N, and there is a 30 N rolling friction force acting on trunk. What is the trunk’s acceleration?
Slide 5-17

3. Vector Addition
Find C = A + B
200 m A
450
250 B
300

4. Find T1 and T2
Mass = 25kg T2 T1
650
500

5. Problem 5:24 A 23kg child on slide inclined at 380.
What forces act on child?
Make a free body diagram
Magnitude of normal force?
If the coefficient of static friction is 0.62, will the child start to slide?

6. Projectile Motion How far down range does the 10kg projectile travel?
400

7. Review Session tomorrow, Tuesday, 6:00-8:30pm. I will answer questions
Review Session tomorrow, Tuesday, 6:00-8:30pm. I will answer questions. No presentation.