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DCA 2 Review 8th Grade
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Unbalanced forces cause...
Acceleration
Balanced forces cause...
 
No change in motion
 
Change in motion
 
Acceleration
 
Speed
What's the magnitude of the net force?
50N to the left
A car travels 30m in 60s. If it continues at this speed, how far will it travel in 100s?
50 m
Which option correctly pairs the motion with the units?
 
S=m/s, V=m/s East, A=m/s^2 East
 
S=m/s East, V=m/s, A=m/s^2 East
 
S=m/s^2 East, V=m/s East, A=m/s
 
S=m, V=m/s , A=m/s East
The diagram shows two forces acting on a moving train. Make a true statement about what will happen when the two forces are applied to the train
 
The train will continue to move at a constant speed
 
The train will slow down because the forces are balanced.
 
The train will accelerate because of unbalanced forces.
 
The train will come to a complete stop
How much force would it take to swing a 2kg bat at 5 m/s^2?
10 N
If a car drives 50 meters in 30 minutes, what was it's speed in meters per hour?
100 m/h
Which row(s) will have the greatest acceleration?
2 and 4
Which of Newton's Laws is best shown through swimming?
3rd
Why does the water keep moving when the man and cup are stopped due to tripping?
Inertia (Objects in motion stay in motion, Newton's 1st Law)
When mass is held constant, as force increases, what happens to the acceleration?
Increases
If a car is traveling 234 miles per hour east, which of these statements is true?
 
The velocity is 3.9 mi/s east
 
The speed is 3.9 mi/s east
 
The acceleration is 234 mi/s^2
 
The acceleration is 3.9 mi/s^2
What's the difference between speed and velocity?
Velocity is speed with direction
If the plane weighs 35 Kg, what is it's acceleration?
20 m/s^2
If the man and car have a mass of 3 Kg, what is the acceleration?
1 m/s^2