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2012 Gr 8 Force And Motion
Test Description: Forces, balanced and unbalanced, speed, and energy transformations
Instructions: Answer all questions to get your test result.
1) What happens to an object in motion when the forces are balanced?
A
it stops
B
it stays in motion
C
it slows down
D
it changes direction
2) On earth, what forces are acting on everything?
A
both 1 and 2
B
friction
C
displacement
D
gravity
3) A 10 N force is used to push a 4 kg stroller a distance of 8 meters. What is the amount of work done?
A
800 J
B
8 J
C
8000 J
D
80 J
4) An object with more mass requires ______ force to get it to move.
A
more
B
less
C
the same
D
no
5) In a distance vs time graph, a striaght line going horizontal indicates the object is_____
A
going the same speed
B
stopped
C
going back to home
D
going faster
6) A car traveling south on Grant road at 30 miles per hour has a velocity of _______
A
15 mph south
B
30 mph south
C
30 mph
D
15 mph
7) In a speed vs time graph, a straight, horizontal line means the object is going
A
going back to home
B
going the same (constant) speed
C
faster
D
stopped
8) Energy is neither created nor destroyed. This is the _____
A
Law of Construction
B
Law of Conservation of Energy
C
Law of Destruction
D
Law of Masses
9) A car burning a fossil fuel so it can move transforms _____ energy into mechanical energy.
A
chemical
B
nuclear
C
electromagnetic
D
electrical
10) A rollercoaster has more potential energy_______
A
at the top of the hill
B
turning a curve
C
at the very end
D
at the bottom of the hill
*select an answer for all questions
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