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4. 1 This opposes motion between two surfaces that are touching? What is friction. Click here for answer back

5. 2 This is friction that does not involve any movement. back Click here for answer What is static friction.

6. 3 This is the measure of the gravitational force on an object. back Click here for answer What is weight.

7. 4 ________ is how much matter is packed into an object. back Click here for answer What is mass.

8. 1 This is the SI unit we use to measure force. back Click here for answer What is a Newton.

9. 2 __________ is a push or a pull on an object. back Click here for answer What is a force.

10. 3 Would oil being added to a motor in a car be a helpful or harmful decrease in friction. back Click here for answer What is a helpful decrease in friction.

11. 4 This is a point that you need in order to measure motion. You need a _______ point in order to detect motion. back Click here for answer What is a reference point?

12. . 1 This is the speed of a mouse running 20 miles in 5 hours. back Click here for answer What is 4 miles per hour.

13. 2 These are the two types of Kinetic friction there are. back Click here for answer What is sliding kinetic friction and rolling kinetic friction.

14. 3 Which type of friction rolling or sliding has the greater amount of friction occurring. back Click here for answer What is sliding friction has more friction than rolling friction.

15. 4 This is the formula for speed. back Click here for answer What is speed = distance / time?

16. 1 The combination of all the forces acting on an object is called ___ ______. back Click here for answer What is net force.

17. 2 As the mass of an object increases …..what happens to the gravity of that object. back Click here for answer The gravity increases as the mass increases.

18. 3 When the net force on an object is equal to zero newtons then the forces would be (balanced, unbalanced)? back Click here for answer What is balanced

19. 4 This is the one thing we add to speed in order to have a velocity? back Click here for answer What is a direction?

20. 1 Would this be a helpful or harmful increase in friction. Sand being put on icy roads in the winter. back Click here for answer What is a helpful increase in friction.

21. 2 Would this be a harmful of helpful increase in friction…….parts in a car rubbing together and wearing them down. back Click here for answer What is a harmful increase in friction.

22. 3 Be careful with this one on velocity. What is the velocity of a balloon floating from California to Florida going 2000 miles in 200 hours. back Click here for answer What is 10 miles per hour East. Need the East to be a velocity.

23. 4 In order for motion to occur do you need to apply a (balanced, or unbalance ) force to an object. back Click here for answer What is unbalanced?