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8th Review Unit 2
Test Description: REVIEW
Instructions: Answer all questions to get your test result.
1) How would a large boat be affected if it was moving North at 6.5m/s and the south current is 1.2m/s, and then suddenly the south current decreases??
A
Direction of boat will change
B
Boat would move slower
C
Boat would move faster
D
Boat will stop
2) Mr. Martinez pushes a box 16N to the left and Mrs. Flores pushes the same box in the opposite direction with 8N to the right, what is the result?
A
Box moves to the left with 2N of force
B
Box moves to the left with 8N of force
C
Box moves to the right with 24N of force
D
Box moves to the right with 8N of force
3) A 2000 kg race car and a 500 kg Go Cart are racing. SAME force is applied to each of them. What best describes the ACCELERATION of both of them?
A
Race car will accelerate 4 times as fast
B
Go Cart will accelerate four times as fast
C
Race car will accelerate twice as fast
D
Go Cart will accelerate twice as fast
4) An object in motion stays in motion unless an unbalanced force acts upon it. What force eventually causes the object to stop moving?
A
Weight
B
Mass
C
Gravity
D
Friction
5) On a graph Mrs. Flores races her new car 15m in 3 seconds? What is her average speed?
A
30 m/s
B
5 m/s
C
15 m/s
D
3 m/s
6) A tube weighing 62kg is being pulled by a truck with a force of 124N, what is the acceleration of the tube? Remember F=m x a. Plug in your numbers where they go!
A
0.5 m/s2
B
0.2 m/s2
C
2 m/s2
D
5m/s2
7) Using a table and a graph-which direction would my lines go when describing CONSTANT speed?
A
^Up and Down on graph
B
\Down on graph
C
/ Up on graph
D
----- Straight on graph
8) Based on the law of action/reaction, if you are on a surf board and fell off, which direction would the surf board go?
A
to the left
B
in front of you
C
behind you
D
to the right
9) If Mr. Martinez was buying Cherry Slushies from Sonic for all of 8th grade, why would he be extra careful when making turns or coming to a stoplight?
A
Law of conservation of mass
B
Law of force and acceleration
C
Law of inertia
D
Law of action-reaction
10) If Ms. Kroll was at Six Flags with her kids and was brave enough to ride the Rattler roller coaster, where would they have they greatest potential energy?
A
going up
B
at the very top
C
at the very bottom
D
coming down
11) Mr. Martinez's TRUCK and Ms. Flores' CAR of different masses, were driving down Pearsall Rd at 104 kilometers per hour. When coming to the stop sign on Shepherd Rd they each applied their brakes with same force. What best describes what happened?
A
Car with smaller mass had inertia
B
Truck with more mass took longer to stop
C
Truck took less force to stop
D
Car with smaller mass took longer to stop
12) If Coach Chessher rolls a football down the bleachers 5.00cm in 2.42 seconds, what is the average speed of the football? Remember S=d/t And round up if you have to!
A
1.55 m/s
B
1.33 m/s
C
2.07 m/s
D
3.06 m/s
13) The weather has been humid lately and Mrs. Flores has to use the flat iron to straighten her frizzy hair. What happens when she plugs in the hot iron with the button on the ON position?
A
Electrical energy to thermal energy occurs
B
Mechanical energy to thermal energy occurs
C
Thermal energy to mechanical energy occurs
D
Thermal energy to electrical energy occurs
14) Mrs. Moreno walks from her room to the cafeteria at a constant speed for 20 minutes. Then she stops in the teachers lounge and talks to Mrs. Flores. She then walks back to her room. What would graph look like?
A
lines would go up, stop, then go back down
B
lines would start and go down and stay down
C
lines would start and go up and stay up
D
lines would stay straight all the way across
*select an answer for all questions
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