lecturenotes-Jan27

lecturenotes-Jan27 - First Exam instructions First Exam...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
First Exam instructions
Background image of page 2
First Exam instructions
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Equation Sheet Posted Physics
Background image of page 4
Quick Review Force and Motion - I (Chapt. 5) - gravitational - tension - normal Force and Motion - II (Chapt. 6) - friction 1 st Law - 2 nd Law - vector 3 rd Law - (i.e. interaction pairs) F net = F i INERTIA stay in motion(rest) F net = m a F A B = F B A Newton’s laws F net , x = ma x F net , y = ma y F net , z = ma z
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Rules for the Application of Newton’s Laws of Motion 1. Choose the system to be studied. 2. Make a simple sketch of the system. 3. Choose a convenient coordinate system. 4. Identify all the forces that act on the system. Label them on the diagram. 5. Apply Newton’s laws of motion to the system.
Background image of page 6
Solving Force Problems 1) Read the problem and draw a picture. 3) Draw a convenient coordinate system and resolve forces into components. 4) Define direction of acceleration, if any 6) Write Force equations for each direction… Solve Newton’s 2 nd law (vector) for each system 2) Draw a free-body diagram showing all forces acting on body. 5) Subdivide into differing systems if needed
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Example: Accelerating Masses 1) Draw a free-body diagram 2) Draw coordinates & resolve forces 3) Define direction of acceleration: I think the heavier block will go down The forces don’t balance. What is the acceleration, a? a=? a=? If the 3m block goes down, it accelerates. Now write your force equations for both masses: for mass m: for mass M=3m: Ma = Mg T 3 ma = 3 mg T ma = T mg 3 ma = 3 mg T ma = T mg 4 ma = 2 mg a = 1 2 g
Background image of page 8
A block of mass M is hung by ropes as shown. The system is in equilibrium. The point O represents the knot, the junction of the three ropes. Which of the following statements is true concerning the magnitudes of the three forces in equilibrium? a) F 1 + F 2 = F 3 b) F 1 = F 2 = 0.5 × F 3 c) F 1 = F 2 = F 3 d) F 1 > F 3 e) F 2 < F 3 Questions
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
A force of magnitude F pushes a block of mass 2 m , which in turn pushes a block of mass m as shown. The blocks are accelerated across a horizontal, frictionless surface. What is the magnitude of the force that the smaller block exerts on the larger block?
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 26

lecturenotes-Jan27 - First Exam instructions First Exam...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online