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Ch 2, 8th Grade
Test Description: Newton's Laws of Motion
Instructions: Answer all questions to get your test result.
1) Force is measured in
A
joules
B
meters per second
C
pounds
D
Newtons
2) Objects that are closer together will experience
A
no difference in gravitational force
B
greater gravitational force
C
fluctuations in gravitational force
D
less gravitational force
3) If an object is in motion, balanced forces will
A
change its velocity
B
keep it at the same speed and direction
C
none of the above
D
slow it to a stop
4) In order for an object's velocity to change, the forces on it need to be
A
unbalanced
B
balanced
C
equal
D
only gravity and friction
5) The type of collision in which objects collide and bounce off of each other is called
A
an elastic collision
B
a fluid collision
C
a glue collision
D
an inelastic collision
6) Your mass changes when you visit the moon.
A
true
B
false
7) Why does your weight change when you visit another planet?
A
it doesn't; mass changes instead.
B
because you lose weight on the journey
C
because the sun's energy is different there
D
because the gravitational pull on that planet is different from Earth's
8) Friction can be reduced by
A
using a more textured surface
B
pressing down harder on an object
C
using lubricants
D
all of the above
9) The type of friction that prevents surfaces from sliding past each other is called
A
sliding friction
B
fluid friction
C
static friction
D
none of the above
10) The tendency of an object to resist a change in motion
A
friction
B
force
C
noncontact force
D
inertia
11) A push or a pull
A
gravity
B
friction
C
inertia
D
force
12) The amount of matter in an object
A
momentum
B
noncontact force
C
force pair
D
mass
13) Which is an example of noncontact force?
A
pulling a wagon
B
all of the above
C
gravity
D
friction
14) The force two objects apply on each other
A
force pair
B
inertia
C
balanced forces
D
unbalanced forces
15) You push a toy car along the floor. If there were no friction between the floor and the car,
A
the car would go through the floor
B
the car would continuously speed up
C
the car would gradually slow to a stop
D
the car would keep going
16) When all the forces acting on an object combine with a net force of 0
A
balanced forces
B
gravity
C
contact forces
D
unbalanced forces
*select an answer for all questions
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