Download ANSWERS Zoink Questions: Force and Motion Test

Name________________________________ Date_________________ Period_______
ANSWERS Zoink Questions: Force and Motion Test
1. Name two common references points.
Tree, building, floor, etc.
2. _________________ is defined when an object’s distance from another object is
changing.
Motion
3. What is the formula for speed?
Speed = Distance / Time
4. If a boat is traveled 500 meters in 25 seconds what is it’s average speed?
500m/25 sec = 20 m/sec
5. What is the difference between speed and velocity?
S = d/t
velocity = d/t and a direction
6. Draw a graph that has constant speed
Distance
Time
7. Draw a graph that shows an object at rest.
Distance
This graph shows both constant and at rest
Time
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
8. Define force
In physical science, a push or a pull.
9. If a golf cart travels 200 yards in five seconds. Calculate it’s average speed.
200 yards / 5 secs = 40 yds/sec
10. The rate at which an object is moving at a given instant is defined as _________?
Instantaneous speed
11. A distance-time graph indicates that an object moves 300m in 15 seconds and
then remains at rest for 15 seconds. What is the average speed of the object?
300m/ (15+15 sec) = 300m/ 30 sec = 10 m/sec
12. What does the graph indicate about an object in motion?
Distance
Time
An object is changing speed
13. ____________________ is defined as total distance divided by the total time?
Average Speed
14. A Newton is used to measure ____________________.
Force
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
15. An upward force of 750 N is applied to a box weighing 80 N. Draw a vector
diagram to represent this situation.
750 N
80 N
16. Draw a picture with a balance force using 40 N.
40 N
40 N
17. A ________________________ force allows an object to move.
Unbalanced
18. What is the net force if a force of 12 N is applied from the left on a box and 12 N
on the right?
0 (N) net force
19. The following picture represents an unbalanced force what is the net force?
60N
55 N to the right
Golden-Review Science 8th
5N
Name________________________________ Date_________________ Period_______
20. A trip is taken form Columbus to Cincinnati. The trip takes 2 hours and covers
approximately 120 miles. What is the velocity of the car trip?
120 miles/ 2 hours = 60miles/hr
south
21. Explain why a biker has to pedal harder to travel at a constant speed into the wind
on a windy day compared to traveling on the same road at the same speed on a
calm day?
Wind resistance is a force that slows something in motion.
22. The motion graph above also shows the motion of a jogger on a run one day. The line
is divided into segments. The middle segment is horizontal. What does that tell you
about the jogger’s progress between minute 6 and minute 8?
The jogger is at rest
23. What was the joggers average speed for the entire trip?
1200 (m)/15 (min) = 80 m/min
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
24. The motion graph above graphs the motion of a jogger on a run one day. How far did
the jogger run in 15 minutes?
1400 m
25. What was the speed of the jogger above?
1400 (m)/15 (min) = 93.3 m/min
26. The reason that water doesn’t fall out of the bucket when I swung it around is
because of this force.
Centripetal force
27. What is the average speed of a person who travels 3600 meters in 3 hours and rest
for 1 hour and travels for another two hours?
3600 (m) / (3+1+ 2) =
3600(m)/ 6 hours = 600 m/ hr
28. What is the average speed of the object form t = 2 to t= 5 ?
10 - 4 = 6 (distance)
5 - 2 = 3 (time)
6/ 3 = 2 m/s
Time (s)
0
1
2
3
4
5
6
7
Distance (m)
0
1
4
6
8
10
10
16
Using the table above: Did the object travel at a constant speed during 2-5 seconds?
Show work
Yes because each of the speeds are 2m/s
4/2 =2m/s
6/3 = 2m/s 8/4= 2m/s
Golden-Review Science 8th
10/5 = 2m/s
Name________________________________ Date_________________ Period_______
Using the table above: Did the object travel at a constant speed during 0-7 seconds?
Show work
NO because using the above speeds are 2m/s and at time 1 the speed
is 1/1 = 1m/s = changing speeds
Using the table above: Where is the object at rest?
At 6 secs
29. Describe the potential and kinetic energy levels when throwing a ball up in the air
and catching in. (Include a picture).
26. What are Newton’s 3 laws of motion
a. For every action there is an equal and opposite re-action.
b. Acceleration is produced when a force acts on a mass. Mass
increases = force increases
c. An object at rest will remain at rest unless acted on by an
unbalanced force. An object in motion continues in motion
unless acted upon by another force.
"the law of inertia".
27. Which law applies to which example
a. Watermelon vs. an apple dropping from the football stands
i. Law 2
b. Shuttle launching thrust pushes the exhaust gases downward as the gases
push the shuttle upward with an equal force
i. Law 3
c. A golf ball will remain on the tee until the club hits it
i. Law 1
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
1. Name two common references points.
2. _________________ is defined when an object’s distance from another object is
changing.
3. What is the formula for speed?
4. If a boat is traveling 500 meters in 25 seconds what is its average speed?
5. What is the difference between speed and velocity?
6. Draw a graph that has constant speed
Distance
Time
7. Draw a graph that shows an object at rest.
Distance
Time
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
8. Define force
9. If a golf cart travels 200 yards in five seconds. Calculate its average speed.
10. The rate at which an object is moving at a given instant is defined as _________?
11. A distance-time graph indicates that an object moves 300m in 15 seconds and
then remains at rest for 15 seconds. What is the average speed of the object?
12. What does the graph indicate about an object in motion?
Distance
Time
13. ____________________ is defined as total distance divided by the total time?
14. A Newton is used to measure ____________________?
15. An upward force of 750 N is applied to a box weighing 80 N. Draw a vector
diagram to represent this situation.
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
16. Draw a picture with a balance force using 40 N.
17. A(n) ________________________ force allows an object to move.
18. What is the net force is a force of 12 N is applied from the left on a box and 12 N
on the right?
19. The following picture represents an unbalanced force what is the net force?
60N
5N
20. A trip is taken form Columbus to Cincinnati. The trip takes 2 hours and covers
approximately 120 miles. What is the velocity of the car trip?
21. Explain why a biker has to pedal harder to travel at a constant speed into the wind
on a windy day compared to traveling on the same road at the same speed on a
calm day?
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
22. The motion graph above also shows the motion of a jogger on a run one day. The line
is divided into segments. The middle segment is horizontal. What does that tell you
about the jogger’s progress between minute 6 and minute 8?
________________________________________________________________________
________________________________________________________________________
23. What was the joggers average sped for the entire trip?
24. The motion graph above graphs the motion of a jogger on a run one day. How far did
the jogger run in 15 minutes?
25. What was the speed of the jogger above?
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
26. The reason that water doesn’t fall out of the bucket when I swung it around is
because of this force.
27. What is the average speed of a person who travels 3600 meters in 3 hours and rest
for 1 hour and travels for another two hours?
28. What is the average speed of the object form t = 2 to t= 5 ?
Time (s)
0
1
2
3
4
5
6
7
Distance (m)
0
1
4
6
8
10
10
16
Using the table above: Did the object travel at a constant speed during 2-5 seconds?
Show work
Using the table above: Did the object travel at a constant speed during 0-7 seconds?
Show work
Using the table above: Where is the object at rest?
Golden-Review Science 8th
Name________________________________ Date_________________ Period_______
29. Describe the potential and kinetic energy levels when throwing a ball up in the air
and catching in. (Include a picture).
30. What are Newton’s 3 laws of motion
a.
b.
c.
31. Which law applies to which example
a. Watermelon vs. an apple dropping from the football stands
i. Law ________________
b. Shuttle launching thrust pushes the exhaust gases downward as the gases
push the shuttle upward with an equal force
i. Law ________________
c. A golf ball will remain on the tee until the club hits it
i. Law ________________
Golden-Review Science 8th