1. GOOD AFTERNOON! * Make sure you have your assigned clicker and science journals for today’s lesson. * Open your journals to page 33 and title the page “Newton’s Laws of Motion” (add this title to your table of contents)

2. An object will remain at rest unless acted upon by an “unbalanced” force. An object in motion will continue with constant speed and direction, unless acted on by an unbalanced force. This law shows how force, mass and acceleration are related as shown in the equation below: Force = mass x acceleration For every action there is an equal and opposite reaction.

3. Study Guide: *Speed –What are the axes on a speed graph? –How to calculate speed –What are the units for speed? *Velocity –How to calculate velocity –What are the units for velocity? *Acceleration –What are the axes on an acceleration graph? –Formula for acceleration –What are the units for acceleration? *Newton’s Laws of Motion –Define each law of motion –Give examples of each law of motion –What is the formula for Newton’s second law of motion? *Balanced and Unbalanced Forces For more practice see online textbook pages 102-107. Username: hildesciencePassword: mustang2013

4. Based on the graph, which train traveled the fastest? A. Train A B. Train B C. Train C D. Train D

5. A car travels north at 60 miles per hour. This describes the car’s ____________. A.Acceleration B.Velocity C.Distance D.Speed

6. The unit “km/hr 2 ” can be used to describe the _________ of an object. A.Velocity B.Speed C.Acceleration D.Position

7. Wearing a seatbelt protects you from effects that are best explained by understanding: A.Balanced forces B.Gravity C.Newton’s 1 st law of motion D.Newton’s 2 nd law of motion

8. If a force of 50 N is applied to each of the 3 objects, which one will have the greatest acceleration? A.Object X B.Object Y C.Object Z ObjectMass (g) X25 Y50 Z75

9. Which statement is true about the car in the illustration? A.The car moves at a constant velocity for 10 sec B.The car’s speed never changes C.The car accelerates over a 10- second interval D.The car is at rest for 10 sec

10. Marc and Joshua are playing tug of war. Marc is pulling left on one end of a rope with 10N of force, while Joshua is pulling on the other end of the same rope with 12N of force. Who’s pulling harder? How many Newtons harder is he pulling it? A.Joshua; 12N Harder B.Joshua; 2N Harder C.Marc, 10N Harder D.Marc, 2N Harder