FPC Day 30 Free Body Diagrams and Mass v Weight

Warm Up If an object is flying through the air, draw arrows on this picture to represent the forces acting on it. OBJECT

Agenda Free Body Diagrams Mass v Weight Homework: Reading Kinematics 3.2, 3.3, 4.1 & 4.2 Due Wednesday, 11/19 (Already done? Have it out during seat work today)

Learning Target: Newton’s 2 nd Law

Free Body Diagrams These are used to show all of the forces acting upon an object so you can determine the NET FORCE and how it will affect the objects motion Net Force: is the sum of all the forces acting upon an object. 5

* Balanced or Unbalanced?

Redraw the object with the net force? Are the forces on the object balanced or unbalanced? What is the motion of the object? 15 N 20 N The object is initially at rest Net Force= 5 N

Quick Tutorial Video Than Practice Get out iPad or Computer Go to the URL or Scan QR Code on sheet Watch video (use head phones if you have them) – See how Free Body Diagrams are drawn – When done start try 1 st one on sheet – Raise hand when done and I will check it

Free Body Diagrams Practice DO 1.Complete ALL the steps for each problem on the right hand side 2.Work together to ask each other questions 3.I will be calling on random group members to explain problems to me DONE BY 20 minutes WHEN DONE raise your hand to show your teacher

Set Up Cornell Notes: Right hand Side Title: Mass versus Weight Write down three things from the video: Mass vs. WeightMass vs. Weight

Mass versus Weight Mass How many particles are packed into an object Units: grams or kilograms Weight The measurement of gravity’s pull on an object Is a force F gravity =mass * a gravity – Gravity = 9.8 m/s/s Units: Newtons Remember if you want to lose weight go to the moon!

Converting Pounds (lb) to Kilograms (kg.) 1 Pound (lb) = 0.45 Kilograms (kg) 1 Kilogram (kg) = 2.2 Pounds (lb) 120 lb * 0.45 kg 1 lb = 54 kg What is 1 car____? 1 steering wheel What is 1? 1 What is 1 steering wheel ? 1car What is 1 car____? 4 wheels 3 cars * 4 wheels____? 1 car 1 lb * 0.45 kg 1 lb =.45 kg 2 lb * 0.45 kg 1 lb =.90 kg 1 kg * 2.2 lb 1 kg = 2.2 lb 2 kg * 2.2 lb 1 kg = 4.4 lb 120 kg * 2.2 lb 1 kg = 264 lb Write this down in notes = 12 cars

Practice in your notebook A soccer ball has a mass of 0.43 kg, what is its weight in lb? A Ferrari has a mass of 1100 kg, what is its weight in lb? The average weight of a Boston terrier is 18 lb Calculate the mass in kg. Calculate your mass in kg!