Exam MULTIPLE CHOICE. Choose the one alternative that best

advertisement
Exam
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Suppose that an object travels from one point in space to another. Make a comparison between the
displacement and the distance traveled.
1)
A) The displacement can be either greater than, smaller than, or equal to the distance traveled.
B) The displacement is either greater than or equal to the distance traveled.
C) The displacement is either less than or equal to the distance traveled.
D) The displacement is always equal to the distance traveled.
2) A new car manufacturer advertises that their car can go "from zero to sixty in 8 s". This is a
description of
A) instantaneous speed.
B) average acceleration.
C) instantaneous acceleration.
D) average speed.
3) Suppose that a car traveling to the East (+x direction) begins to slow down as it approaches a traffic
light. Make a statement concerning its acceleration.
2)
3)
A) The acceleration is zero.
B) The car is decelerating, and its acceleration is negative.
C) The car is decelerating, and its acceleration is positive.
D) A statement cannot be made using the information given.
4) Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a
traffic light. Make a statement concerning its acceleration.
4)
A) The car is decelerating, and its acceleration is negative.
B) The car is decelerating, and its acceleration is positive.
C) The acceleration is zero.
D) A statement cannot be made using the information given.
5) If the velocity of an object is zero, does it mean that the acceleration is zero? Support your answer
with an example.
5)
A) yes, because of the way in which acceleration is defined
B) no, and an example would be an object coming to a stop
C) no, and an example would be an object starting from rest
D) yes, because of the way in which velocity is defined
6) Suppose that an object is moving with constant acceleration. Make a statement concerning its
motion with respect to time.
A) In equal times it moves equal distances.
B) In equal times its velocity changes by equal amounts.
C) In equal times its speed increases by equal amounts.
D) A statement cannot be made using the information given.
1
6)
7) Objects A and B both start from rest. They both accelerate at the same rate. However, object A
accelerates for twice the time as object B. What is the distance traveled by object A compared to
that of object B?
A) three times as far
B) twice as far
C) four times as far
D) the same distance
7)
8) When an object is released from rest and falls in the absence of friction, which of the following is
true concerning its motion?
A) Its acceleration is constant.
B) Its velocity is constant.
C) Both its acceleration and its velocity are constant.
D) Neither its acceleration nor its velocity is constant.
8)
9) Suppose a ball is thrown straight up. What is its acceleration just before it reaches its highest point? 9)
A) zero
B) slightly greater than g
C) slightly less than g
D) exactly g
10) A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a
statement about the direction of the velocity and acceleration as the ball is coming down.
A) Both its velocity and its acceleration point upward.
B) Both its velocity and its acceleration point downward.
C) Its velocity points upward and its acceleration points downward.
D) Its velocity points downward and its acceleration points upward.
11) Suppose a skydiver jumps from a high-flying plane. What is her acceleration when she she reaches
terminal velocity?
A) It is essentially zero.
B) It is a constant pointing upward.
C) It is approximately 9.8 m/s2 downward.
D) It is in the upward direction.
10)
11)
12) Suppose a ball dropped in the absence of air resistance. Make a statement concerning its
acceleration.
A) Its acceleration is constantly decreasing.
B) Its acceleration is constantly increasing.
C) Its acceleration is constant.
D) Its acceleration is zero.
12)
13) Ball A is dropped from the top of a building. One second later, ball B is dropped from the same
building. As time progresses, the distance between them
A) decreases.
B) increases.
C) remains constant.
D) cannot be determined from the information given.
13)
2
14) An object is moving with constant non-zero velocity in the +x axis. The velocity versus time graph
of this object is
14)
A) a vertical straight line.
B) a straight line making an angle with the time axis.
C) a horizontal straight line.
D) a parabolic curve.
15) The slope of a position versus time graph gives
A) displacement.
15)
B) acceleration.
C) position.
D) velocity.
16) The slope of a velocity versus time graph gives
A) displacement.
16)
B) acceleration.
C) position.
D) velocity.
17) The area under a curve in an acceleration versus time graph gives
A) velocity.
B) displacement.
C) acceleration.
18) If the position versus time graph of an object is a horizontal line, the object is
17)
D) position.
18)
A) at rest.
B) moving with constant non-zero speed.
C) moving with infinite speed.
D) moving with constant non-zero acceleration.
19) If the position versus time graph of an object is a vertical line, the object is
19)
A) at rest.
B) moving with infinite speed.
C) moving with constant non-zero acceleration.
D) moving with constant non-zero speed.
20) If the velocity versus time graph of an object is a horizontal line, the object is
A) moving with constant non-zero acceleration.
B) at rest.
C) moving with constant non-zero speed.
D) moving with infinite speed.
3
20)
Answer Key
Testname: CH 2 QUESTIONS
Dc
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
B
B
B
C
B
C
A
D
B
A
C
B
C
D
B
A
A
B
C
4
Download