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8.MS-PS2-2
Test Description: 8.MS-PS2-2
Instructions: Answer all questions to get your test result.
1) Which of the following is an example of an object not changing its motion?
A
a robot moving in a straight line at a constant speed
B
a ball rolling down a hill faster and faster
C
a ball starting to move after being kicked
D
a car slowing down as it approaches a stop sign
2) What is the best explanation for what happens when the net force acting on an object is 0 newtons?
A
the object doesn't change in motion
B
the object speeds up or slows down
C
the object doesn't change its direction
D
the object doesn't move
3) If one person pushes a box to the left with a force of 5N and someone else pushes it to the right with a force of 10N, what is the net force?
A
5N to the left
B
15N to the right
C
5N to the right
D
15N to the left
4) If two people pull a rock in the same direction, how would you calculate the net force applied to the rock?
A
add the two forces together
B
add the two forces together, and then also add in the force of friction
C
find the difference between the two forces
D
add the two forces together, and subtract the force of friction
5) What kind of force is gravity?
A
trick question: it isn't a force
B
a balanced force
C
a pull
D
a push
6) In order for you to sit still on a chair, what must be happening?
A
the forces acting on the chair are unbalanced in some way
B
most of the forces acting on the chair are balanced
C
at least one force acting on the chair is balanced
D
all of the forces acting on the chair are balanced
7) The newton (N) is a measurement of force. Who is it named after?
A
Sir Darwin Newton
B
Sir Charles Newton
C
Sir Francis Newton
D
Sir Isaac Newton
8) Which of the following is the best explanation of net force equaling zero?
A
all forces acting on the object are balanced
B
the forces acting on the object are unbalanced
C
there aren't any forces acting on the object
D
the object isn't moving
9) Which of the following is NOT an example of a change in motion?
A
changing nether speed nor direction
B
changing speed and direction
C
changing direction, but not speed
D
changing speed, but not direction
10) Unless an unbalanced force is applied, what will an object do naturally?
A
slow down until it stops
B
begin to change in direction
C
maintain its current speed and direction
D
speed up until it reaches its maximum speed
*select an answer for all questions
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