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Force And Motion 2
Test Description: Test review part 2
Instructions: Answer all questions to get your test result.
1) Friction occurs because of
A
unbalanced forces
B
only the masses of any two objects
C
the roughness of an object's surface
D
only the weights of any two objects
2) A hiker's velocity changes from 1.8 m/s uphill to 1.5 m/s uphill. How do you know they have a negative acceleration?
A
his direction changed
B
his direction did not change
C
his speed decreased
D
his speed increased
3) In which of the following is a skater NOT accelerating?
A
going straight at a constant speed
B
going straight and speeding up
C
going in circles
D
going straight and slowing down
4) A student has a weight of 420N on Earth. What is his weight on the moon? (Moon's gravity is 1/6 of Earth's)
A
70kg
B
70N
C
2520kg
D
2520N
5) An unbalanced force can cause an object's motion to change by...
A
changing direction or speed; starting or stopping motion
B
changing direction or speed; stopping but not starting motion
C
changing direction or speed only
D
changing direction or speed; starting but not stopping motion
6) The law of universal gravitation says that gravitational force is...
A
related to weight and distance
B
related to mass and distance
C
related to weight and friction
D
related to mass and friction
7) To produce change in motion, a force must be an
A
balanced force
B
frictional force
C
unbalanced force
D
gravitational force
8) The gravitational pull is greater between 2 objects that
A
have rougher surfaces
B
are farther apart
C
have greater masses
D
are moving at greater speed
9) What is an object that appears to stay in place that helps you detect motion in another object?
A
newton
B
reference point
C
a shoe
D
the sky
10) dividing the total distance traveled by the total time is how to calculate...
A
motion
B
acceleration
C
speed
D
velocity
*select an answer for all questions
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