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Chapter 11
Test Description: Motion
Instructions: Answer all questions to get your test result.
1) If the net force on an object is zero then the object has
A
balanced forces
B
unbalanced forces
C
action forces
D
reaction forces
2) a tug of war that results in one team pulling the other across the line is an example of
A
action forces
B
unbalanced forces
C
reaction forces
D
balanced forces
3) How can the friction on a water slide be reduced
A
increase the slope of the slide
B
warm the surface of the slide
C
run a constant stream of water down the slide
D
keep the surface of the slide dry
4) A car is parked on a hill. In order to deep the car from rolling down hill, how great must the static friction acting on that car be
A
smaller than the force pulling the car down the hill
B
greater than the force pulling the car up the hill
C
equal to the force pulling the car down hill
D
greater than the force pulling the car down the hill
5) On a bus travelling north at 20 m/s, a child stands up and walks toward the back of the bus at 1.3 m/s. What is the child's resultant velocity?
A
21.3 m/s south
B
18.7 m/s north
C
21.3 m/s north
D
18.7 m/s south
6) speeding up, slowing down, and changing direction is best described as
A
velocity
B
acceleration
C
displacement
D
distance
7) a cyclist traveling at an initial speed of 10.0 m/2. She accelerates at a rate of 0.5 m/s^2. What is her final velocity after 9.0 s?
A
14.5 m/s^2
B
14.5 m/s
C
5.5 m/s
D
5.5 m/s^2
8) Peter runs in a constant direction on a straight road. The velocity vs time graph of Peters motion shows a straight line with a negative slope. What does the line tell you ?
A
Peter's speed is constant
B
Peter's speed is decreasing
C
Peter's speed is increasing
D
Peter's speed is increasing, then decreasing
9) What happens when a car slows down and velocity changes?
A
positive acceleration
B
resultant acceleration
C
constant acceleration
D
negative acceleration
10) A game of tug of war is and example of
A
unbalanced forces
B
rolling friction
C
air resistance
D
streamlining
*select an answer for all questions
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