1. Free Body Diagrams and Acceleration
Solving for a
Outline

2. Demo
Draw the free body diagram for a mass hanging from a ceiling and supported by two strings.

3. Ex 2: How far did the block move after 2 seconds if it
Demo
Ex 1: A block of mass 5 kg is being pulled by a rope with a force of 20 N over a frictionless surface. Determine the acceleration of the block.
Ex 2: How far did the block move after 2 seconds if it
started from rest ?

4. Demo
Ex 3: Two blocks are pulled with a force of 20N over a frictionless surface. Block 1 has a mass of 1kg and block 2 a mass of 3kg. What is the acceleration of the system ?

5. Demo
Ex 4: Two blocks are connected over a frictionless pulley. What is the acceleration of the system given no friction.
m1=2kg
m2=1kg

6. Demo
Ex 4: Two blocks are connected over a frictionless pulley. What is the acceleration of the system given no friction. m1 m2 θ

7. Do for next class: Read: Sections 5.1, 5.2
Suggested problems: 5.3, 5.5a, 5.7