Download Forces and Motion Study Guide

Physical Science
Forces and Motion Study Guide
** YOU MUST ALSO USE THE NOTES PROVIDED IN CLASS TO PREPARE FOR
THE TEST **
1. What is a “force”?
2.
What is the SI unit for force?
3. What do we mean by the term “net force”?
4. How do you find net force if the forces are going in the same direction? Draw a
force diagram.
The nurse is PUSHING with 35 N of force.
The orderly is PULLING with 25 N of force.
5. How do you find net force if the forces are going in the opposite direction?
Draw a force diagram.
The baby chicks are fighting over the worm. One chick on the left is
pulling with 3N of force and the chick on the right is pulling with 4N.
6. What are “balanced forces”? Draw a force diagram.
7. What are “unbalanced forces”?
8. Which produces a change in motion – balanced forces, or unbalanced forces?
9. Two teams are playing tug of war. If Team A is winning, describe what must
be happening, using the terms net force and either “balanced forces” or
“unbalanced forces”. Draw a force diagram.
Team A
Team B
10. List five other directional terms for force (examples: forward, north).
11. What is gravity?
12. What is the “Law of Universal Gravitation”? Who came up with it?
13. Which of these sets of objects have the greater gravitational attraction?
a.
and
b.
and
OR
14. Which of these sets of objects have the greater gravitational attraction?
and
OR
and
15. What is weight?
16. Are weight and mass the same? Explain.
17. WRITE the following terms in the correct boxes, to tell if they are true about
weight, or about mass:
WEIGHT
MASS
18. What is friction?
19. What causes friction? Draw a picture of what causes friction.
20. Name three ways to reduce (decrease) friction.
1.
2.
3.
21. Name two ways to increase friction.
1.
2.
22.What is air resistance?
23.What characteristics cause some things to be more affected by air resistance
than others?
24. Look at these two parachutes. Which would make the parachute come down
more slowly? Why?
25. What is motion?
26. What two things does speed depend upon?
27.What is the formula for average speed? Show two other ways to arrange this
formula, so that you can find distance, or time, by using the formula.
S=
d=
t=
28. A car travels 300 km in 6 hours. What is its average speed? Show your
work.
29. A bicyclist has an average speed of 10 km per hour. She rode for 4 hours.
How far did she ride? Show your work.
30. An airplane travelled an average of 275 km per hour. It went from
Washington, DC to Orlando, Florida -- a distance of about 1300 km. How long
did it take the plane to get to Orlando? Show your work. Round to the nearest
hundredth.
31. What is “velocity”?
32. If I say “The plane has a velocity of 265 mph”, is the statement correct or not?
Why or why not?
33. Calculate the velocity of a car that travelled 60 miles to the south, in 1.5 hours.
34. If an airplane makes a left turn in the air, while maintaining its speed, has it
changed its velocity? Why or why not?
35. What is acceleration?
36. Is the following statement true or false: “My mother’s car accelerated as it
turned the corner at 30 mph.”? Explain your answer.
37. Draw a picture of something that is negatively accelerating and explain what is
happening.
38. What is another word for “negative acceleration”?
39.
40. The graph below shows the TOTAL distance two cars drove over time (a
time/distance graph). One of them had a constant speed and the other is
accelerating. Which one (A or B) shows the car with the constant speed and
which one shows the car accelerating? How can you tell?