Chapter 11 Using Forces Study Guide

1. An object's ____ can be described as points on axes in a grid.
2. Mass X Velocity =
3. What formula is used to calculate acceleration?
4. From a complete stop, a car reaches a velocity of 280 km/s east in 7 seconds. What is the rate of acceleration?
5. How do acceleration and deceleration compare to one another?
6. A smooth surface usually has less ___ than a rough surface.
7. Pushes, pulls, and lifts are all types of
8. Two forces acting on an object in a way that changes the object's motion create a(n)
9. According to Newton's Law of Universal Gravitation, the force of gravity depends on
10. The children at the local pool have noticed that the bottom of the pool is very slippery. You have been asked to come up with a plan for increasing the friction on the pool bottom. What would you suggest?
11. Performing work or changing an object requires
12. A rollercoaster losing potential energy and gaining kinetic energy is an example of the
13. Energy of a moving object is called
14. What are 3 examples of kinetic energy?
15. What is potential energy? Give an example of potential energy.
16. A(n) ___ takes one force and changes its direction, distance, or strength.
17. The ratio of input energy to output work is
18. A lever rotates around a pivot point called a(n)
19. What type of machine is formed when two or more machines are combined?
20. Think of a seesaw. Which part is the fulcrum? Which part is the lever?
21. The amount of energy used to perform a task is
22. An object that moved as a result of a machine working is called the
23. A group of experienced climbers are going rock climbing. What simple machine should they bring to help with the climbing? Why?
24. On Earth, which forces tend to slow an object down?
25. Explain velocity. Why does a pilot need to know the velocity of a plane he/she is flying?