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Exam II Review. Lecture 15. 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. Vector Addition.

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exam ii review

Exam II Review

Lecture 15

slide2

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

vector addition
Vector Addition
  • Find C = A + B

200 m

A

450

250

B

300

find t 1 and t 2
Find T1 and T2
  • Mass = 25kg

T2

T1

650

500

problem
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?
projectile motion
Projectile Motion
  • How far down range does the 10kg projectile travel?

400