1. Newton’s Second Law October 29, 2013

2. Tuesday, 10/29  Pick up video note taking guide from the Physics bin  Use your notes from yesterday to respond to the following (leave room to add discussion notes). 1. List eight examples of accelerated motion 2. Inertia resists ____________. 3. A ___________ causes ______________. 4. Newton’s 2 nd Law of motion is known as the Law of _______________. 5. In your own words describe Newton’s second law of motion.  Reminders: End of the 5 weeks in Friday, 11/1. All make up work/tutorials/retests are due by Wednesday at 4:30 PM. Open note quiz on Wednesday, 10/30

3. Examples of Accelerated Motion 1. Speeding up 2. Slowing down 3. Starting 4. Stopping 5. Changing direction 6. Moving in a circle

4. Warm-up Fill in the Blank Answers 1. Inertia resists Acceleration. 2. A net force causes acceleration. 3. Newton’s 2 nd Law of motion is known as the Law of acceleration. 4. Newton’s 2 nd Law – When a net force is applied to an object, the object will accelerate in the direction of that force.

5. What is the net force needed to accelerate a 1400 kg car at 1.5 m/s 2 ?

6. When a boy exerts a force of 18 N on a rock, the rock accelerates forward at 17 m/s 2. What is the mass of the rock?

7. A constant forward net force of 870 N is applied to a motorcycle and rider with a total mass of 310 kg. How far will the motorcycle travel in the first 16 s, starting from rest?

8. Find the weights of these objects: 1. 1800 kg car 2. 0.12 kg baseball

9. Find the masses of these objects: a. 1. 14 N box 2. 680 N girl

10. A 75 kg astronaut travels to the moon. What is his weight... 1. on earth? 2. on the moon, where g = 1.6 m/s2?