Physics 011

MC#2

Chapter 2: Describing Motion: Kinematics in One Dimension
Ayman A.Ghannam

 1

A bird flies 4.0 meters due north in 2.0 seconds and then flies 2.0 meters due west in 1.0 seconds. What is the bird's average speed?

2.0 m/s

4.0 m/s

8.0 m/s

2/3 5 m/s

 2

If a car is travelling due south with a decreasing speed, then the direction of the car's acceleration is

due east.

due west.

due north.

due south.

 3

A hiker travels 60 meters north and then 120 meters south. What is her resultant displacement?

20 m south

60 m south

120 m south

180 m south

 4

If the average speed of a plane is 500 km per hour, how long will it take to fly 125 km?

4.00 h

2.00 h

0.50 h

0.25 h

 5

Applying the brakes to a car traveling at 45 km/h provides an acceleration of 5.0 m/s2 in the opposite direction. How long will it take the car to stop?

0.40 s

2.5 s

5.0 s

9.0 s

 6

A ball rolls down a frictionless inclined plane with a uniform acceleration of 1.0 m/s2. If its velocity at some instant of time is 10 m/s, what will be its velocity 5.0 seconds later?

5 m/s

10 m/s

15 m/s

16 m/s

 7

A ball rolls down a frictionless inclined plane with a uniform acceleration of 1.0 m/s2. If its initial velocity is 1.00 m/s, how far will it travel in 10 s?

10 m

12 m

60 m

100 m

 8

A body with an initial speed of 25 m/s accelerates uniformly for 10 seconds to a final speed of 75 m/s. What is the acceleration?

3 m/s2

5 m/s2

25 m/s2

50 m/s2

 9

A body initially at rest is accelerated at 5 m/s2 for 10 seconds. What is its final velocity?

0.50 m/s

2.0 m/s

15 m/s

50 m/s

 10

Which graph represents the motion of a body starting from rest and moving with a constant non-zero acceleration?

 11

The speeds of a body at the ends of five successive seconds are: 180, 360, 540, 720, 900 m/h. What is the acceleration of the body?

0.05 m/s2

20 m/s2

180 m/s2

180 m/h2

 12

"An object is initially at rest then moves in a straight line and accelerates uniformly at a rate of 2.00 m/s2."

After the object has been in motion for four seconds, its speed would be ___ m/s.

6.0

8.0

10

12

20

some other value

 13

"An object is initially at rest then moves in a straight line and accelerates uniformly at a rate of 2.00 m/s2."

The distance traveled by the object during the first five seconds of its travel was ___ m.

6.0

10

12

20

25

some other value

 14

"An object is initially at rest then moves in a straight line and accelerates uniformly at a rate of 2.00 m/s2."

The average speed of the object during the first six seconds of its travel was ___ m/s.

6.0

8.0

10

12

16

20

 15

"An object is initially at rest then moves in a straight line and accelerates uniformly at a rate of 2.00 m/s2."

The average speed of the object during the third second of its motion was ___ m/s.

2.0

3.0

4.0

5.0

6.0

8.0

 16

"An object is initially at rest then moves in a straight line and accelerates uniformly at a rate of 2.00 m/s2."

The distance traveled by the object during the fourth second of its travel was ___ m.

2.0

3.0

4.0

5.0

6.0

7.0

 17

"An object of mass m initially at rest experiences a constant acceleration of magnitude ao. After a time interval to has elapsed, the speed of the car is vo and it has traveled a distance do."

After a total time 3 to has elapsed, the speed of the object will be vox ___.

1

2

3

4

8

 18

"An object of mass m initially at rest experiences a constant acceleration of magnitude ao. After a time interval to has elapsed, the speed of the car is vo and it has traveled a distance do."

After a total time 2 to has elapsed, the distance traveled by the object will be dox ___.

1

2

3

4

8

 19

"Six different objects are observed to move in a straight line. Some aspect of the motion of each of the six objects is plotted as a function of time in the following graphs."

Which graph(s) represent(s) a situation in which the object moved with a constant nonzero acceleration?

 20

"Six different objects are observed to move in a straight line. Some aspect of the motion of each of the six objects is plotted as a function of time in the following graphs."

Which graph represents a situation in which the object moved with a constant zero acceleration?

Graph A

Graph B

Graph C

Graph D

Graph E

Graph F

 21

"An object is observed to move in a straight line. Some aspect of the motion of this object is plotted as a function of time in the following graph."

The slope of the dashed line in the graph above represents ___.

an instantaneous position

an average position

a distance traveled

an instantaneous speed

an average speed

a change in speed

 22

"An object is observed to move in a straight line. Some aspect of the motion of this object is plotted as a function of time in the following graph."

The slope of the dashed line in the graph above represents ____.

an instantaneous position

an average position

an instantaneous speed

an average speed

an instantaneous acceleration

an average acceleration

 23

"An object is observed to move in a straight line. Some aspect of the motion of this object is plotted as a function of time in the following graph."

The shaded area in the graph above represents ___.

an average acceleration

an instantaneous position

a change in position or a distance traveled

a change in speed

an instantaneous speed

an average speed

 24

"An object is observed to move in a straight line. Some aspect of the motion of this object is plotted as a function of time in the following graph."

The shaded area in the graph above represents ___.

a change in position

an instantaneous position

a distance traveled

a change in speed

an instantaneous speed

an average speed

 25

"The speed of an object moving in a straight line changes with time as in the figure below."

For which of the time intervals was the average speed of the object greatest?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 26

"The speed of an object moving in a straight line changes with time as in the figure below."

During which time interval did the object travel with a constant nonzero acceleration?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 27

"The speed of an object moving in a straight line changes with time as in the figure below."

During which time interval was the average speed least?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 28

"The speed of an object moving in a straight line changes with time as in the figure below."

During which time interval did the maximum value of the magnitude of the instantaneous acceleration occur?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 29

"The speed of an object moving in a straight line changes with time as in the figure below."

During which time interval was the speed of the object constant?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 30

"The speed of an object moving in a straight line changes with time as in the figure below."

During which time interval did the minimum value of the instantaneous speed occur?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 31

"The speed of an object moving in a straight line changes with time as in the figure below."

During which time interval was the magnitude of the average acceleration greatest?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 32

"The speed of an object moving in a straight line changes with time as in the figure below."

During which time interval was the magnitude of the average acceleration least?

t = 0 to t = 1s

t = 1 to t = 2s

t = 2 to t = 3s

t = 3 to t = 4s

t = 4 to t = 5s

none of the above

 33

"For this question, assume that g = 10.00 m/s2. A small stone originally at rest is dropped over the edge of a very tall building."

During the fourth second of the fall, the speed of the stone changes ___ m/s.

5.0

10

15

20

30

 34

"For this question, assume that g = 10.00 m/s2. A small stone originally at rest is dropped over the edge of a very tall building."

During the second second of fall, the average speed of the stone is ___ m/s.

5.0

10

15

20

30

 35

"For this question, assume that g = 10.00 m/s2. A small stone originally at rest is dropped over the edge of a very tall building."

During the first second of fall, the stone falls a distance of ___ m.

5.0

10

15

20

30

 36

"For this question, assume that g = 10.00 m/s2. One reaches out over the edge of a tall building and throws a stone straight up with an initial speed of 20.00 m/s."

The change in speed of the stone during the first second of its motion is ___ the change in its speed during the third second of its motion.

equal to

less than

more than

 37

"For this question, assume that g = 10.00 m/s2. One reaches out over the edge of a tall building and throws a stone straight up with an initial speed of 20.00 m/s."

The distance traveled by the stone during the 1st second is ___ the distance traveled by the stone during the 2nd second.

equal to

less than

more than

 38

"For this question, assume that g = 10.00 m/s2. One reaches out over the edge of a tall building and throws a stone straight up with an initial speed of 20.00 m/s."

At the instant the stone is at its maximum altitude, the acceleration of the stone is ___.

10 m/s2 upward

10 m/s2 horizontal

10 m/s2 downward

something else

 39

"For this question, assume that g = 10.00 m/s2. One reaches out over the edge of a tall building and throws a stone straight up with an initial speed of 20.00 m/s."

The time required for the stone to reach its maximum altitude is ___ sec.

1

more than 1 but less than 2

2

more than 2