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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
the roughness of an object's surface
C
only the weights of any two objects
D
only the masses 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 speed decreased
B
his direction did not change
C
his direction changed
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 slowing down
C
going in circles
D
going straight and speeding up
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
70N
B
2520kg
C
70kg
D
2520N
5) An unbalanced force can cause an object's motion to change by...
A
changing direction or speed only
B
changing direction or speed; stopping but not starting motion
C
changing direction or speed; starting or stopping motion
D
changing direction or speed; starting but not stopping motion
6) The law of universal gravitation says that gravitational force is...
A
related to mass and distance
B
related to mass and friction
C
related to weight and distance
D
related to weight and friction
7) To produce change in motion, a force must be an
A
gravitational force
B
unbalanced force
C
frictional force
D
balanced force
8) The gravitational pull is greater between 2 objects that
A
have greater masses
B
are moving at greater speed
C
have rougher surfaces
D
are farther apart
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
acceleration
B
speed
C
velocity
D
motion
*select an answer for all questions
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