Download Force and Motion Test Review Answer Key

Force and Motion Test Review
Test: Thursday December 1st
Parent Signature: _________________________________________________(+5)
What to study:
 ISN pages
 Any papers in your science folder
 This review sheet
 Any online resources
Test Review Concepts:
Force (Net force, Balanced/Unbalanced)
Distance vs. time graphs (Constant speed, at rest, steeper line, accelerating)
Speed vs. time graphs (Acceleration, Deceleration, at rest and constant speed)
Average speed (Formula and in graphs)
Review Questions: (Answer Below)
1. In science, a push or a pull is called a (n)
a. Force. X
b. Acceleration.
c. Inertia.
d. Motion.
2. What happens when two forces act on an object in the same direction?
a. The forces cancel each other out.
b. The stronger force prevails.
c. The forces add together. X
d. The total force equals half the sum of the two forces.
3. The amount of matter in an object is the objects
a. Weight.
b. Mass. X
c. Force.
d. Volume.
5. What is the formula for the speed of an object?
a. Distance/Time X
b. Time/Distance
c. Distance X Time
d. Distance + Time
6. Kilometers, meters, and seconds are all
a. Distances.
b. Reference points.
c. Units. X
d. Velocities.
7. Speed equals distance divided by
a. Time. X
b. Velocity.
c. Size.
d. Motion.
8. If the speed of an object does NOT change, the object is traveling at a(n)
a. Constant speed. X
b. Average speed.
c. Increasing speed.
d. Decreasing speed.
9. If a bicyclist travels 30 kilometers in two hours, her average speed is
a. 30 km/h.
b. 60 km/h.
c. 15 km/h. X
d. 2 km/h.
10. A train that travels 100 kilometers in 4 hours is traveling at what average speed?
a. 50 km/h
b. 100 km/h
c. 2 km/h
d. 25 km/h X
11. In graphing motion, the steepness of the slope depends on
a. How quickly or slowly the object is moving. X
b. How far the object has moved.
c. When the object began moving.
d. The direction the object is moving.
12. On a graph showing distance versus time, a horizontal line represents an object that is
a. Moving at a constant speed.
b. Increasing its speed.
c. Decreasing its speed.
d. Not moving at all. X
13. When a force changes an object's motion, the force is
a. Balanced.
b. Moving.
c. Net.
d. Unbalanced. X
On a grap
14. On a graph showing speed versus time, a horizontal line represents an object that
is
a. Moving at a constant speed. X
b. Increasing its speed.
c. Decreasing its speed.
d. Not moving at all.
Short Answer
15.
How far did Kathy jog in the first 4 minutes? 600 m
16.
What is Kathy's average speed? 1500 / 10 = 150m/min
17
How long after Kathy started jogging did Rachel begin jogging? 2 min
18.
Describe Rachel's motion at 9 minutes. Not moving
19. What does the line segment A-B represent? Constant Speed
20. What does the line segment D-E represent? Not moving (at rest)
Net force and direction:
Explain the net force for each below. Also, state the direction and if it is either balanced or unbalanced.
21.
22.
30N
25N
10N
A
30 – 25 = 5N. to the left (unbalanced)
10N
C the left (unbalanced)
10 + 10 = 20N to
.
Average Speed:
Trial 1
Trial 2
Trial 3
Time (s)
Distance (m)
Time (s)
Distance (m)
Time (s)
Distance (m)
5.0
12
3.0
5
7.0
13
23. What is the average speed based on the information provided in the table above? Record
answer in the griddable below:
a. 5 + 3 + 7 = 15.
15 / 3 = 5 sec
b. 12 + 5 + 13 = 30.
30 / 3 = 10 m
C. 10 / 5 2 m/sec
24. On a distance time graph what is considered the Independent variable and the Dependent
variable?
Dependent: Distance
Independent: Time
25. Write a scenario that would match the graph below. Answers will vary.
A car moves at a constant speed for
10 minutes, then it stops at a red
light for 10 minutes. After that it
moves more quickly than before but
again at a constant speed for 10
minutes and finally stops at another
red light for 10 minutes.