Question 1

A child standing on a bridge throws a rock straight down.The rock leaves the child's hand at time t = 0 s.If we take upward as the positive direction,which of the graphs shown below best represents the acceleration of the stone as a function of time?

Accepted Answer

The answer of A child standing on a bridge throws...

Question 2

A motorist travels 160 km at 80 km/h and 160 km at 100 km/h.What is the average speed of the motorist for this trip?

Accepted Answer

The answer of A motorist travels 160 km at 80...

Question 3

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 10⁸ m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)

Accepted Answer

To find the distance in miles that light travels in one year, you multiply the speed of light (3.00 × 10^8 m/s) by the number of seconds in a year (365 days × 24 hours/day × 60 minutes/hour × 60 seconds/minute). Then, convert meters to miles using the conversion factor (1 mile = 1609 meters). The calculation yields approximately 5.88 × 10^12 miles.

Question 4

What must be your average speed in order to travel 350 km in 5.15 h?

Accepted Answer

Average speed = total distance ÷ total time 
Average speed = 350 km ÷ 5.15 h = 67.961 km/h 
Rounded to one decimal place = 68.0 km/h 
Therefore, the closest answer is C) 68.0 km/h.

Question 5

The motion of a particle is described in the velocity vs.time graph shown in the figure.  Over the nine-second interval shown,we can say that the speed of the particle

Accepted Answer

The answer of The motion of a particle is described...

Question 6

A runner ran the marathon (approximately 42.0 km)in 2 hours and 57 min.What was the average speed of the runner in m/s?

Accepted Answer

The runner's total time in seconds is 2 hours * 3600 seconds/hour + 57 minutes * 60 seconds/minute = 7200 seconds + 3420 seconds = 10620 seconds. The distance run is 42.0 km, which is 42,000 meters. The average speed in m/s is then 42,000 meters / 10620 seconds = 3.95 m/s.

Question 7

A child standing on a bridge throws a rock straight down.The rock leaves the child's hand at time t = 0 s.If we take upward as the positive direction,which of the graphs shown below best represents the velocity of the stone as a function of time?

Accepted Answer

The answer of A child standing on a bridge throws...

Question 8

The graph in the figure shows the position of an object as a function of time.The letters H-L represent particular moments of time.  (a)At which moment in time is the speed of the object the greatest?
(b)At which moment in time is the speed of the object equal to zero?

Accepted Answer

The answer of The graph in the figure shows the...

Question 9

The figure shows a graph of the position x of two cars,C and D,as a function of time t.  According to this graph,which statements about these cars must be true? (There could be more than one correct choice.)

Accepted Answer

The answer of The figure shows a graph of the...

Question 10

If you run a complete loop around an outdoor track of length 400 m in 100 s,find your
(a)average velocity and (b)average speed.

Accepted Answer

The answer of If you run a complete loop around...

Question 11

Which of the following graphs represent an object at rest? (There could be more than one correct choice.) 
(a)

(b)

(c)

(d)

(e)

Accepted Answer

The answer of Which of the following graphs represent an...

Question 12

A polar bear starts at the North Pole.It travels 1.0 km south,then 1.0 km east,and then 1.0 km north to return to its starting point.This trip takes 45 min.What was the bear's average speed?

Accepted Answer

The total distance traveled by the bear is the sum of the distances traveled in each direction:
Total distance = 1.0 km + 1.0 km + 1.0 km = 3.0 km
The total time taken is 45 minutes, which is 0.75 hours.
Average speed = Total distance ÷ Total time = 3.0 km ÷ 0.75 hours = 4.0 km/h. Therefore, the answer is C.

Question 13

If,in the figure,you start from the Bakery,travel to the Cafe,and then to the Art Gallery
(a)what distance you have traveled?
(b)what is your displacement?

Accepted Answer

The answer of If,in the figure,you start from the Bakery,travel...

Question 14

You are driving home on a weekend from school at 55 mi/h for 110 miles.It then starts to snow and you slow to 35 mi/h.You arrive home after driving 4 hours and 15 minutes.How far is your hometown from school?

Accepted Answer

The answer of You are driving home on a weekend...

Question 15

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s,how far do you travel during this inattentive period?

Accepted Answer

The answer of If you are driving 72 km/h along...

Question 16

The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure.The two vehicles are initially alongside each other at time t = 0.  At time T,what is true of the distances traveled by the vehicles since time t = 0?

Accepted Answer

The answer of The motions of a car and a...

Question 17

The graph in the figure shows the position of a particle as it travels along the x-axis.  At what value of t is the speed of the particle equal to 0 m/s?

Accepted Answer

The speed of the particle is equal to 0 m/s at the points where the slope of the position vs time graph is 0 (i.e. the particle reaches the peak or valley of its motion). In this graph, the slope is 0 at t = 3 s, which is the only point where the particle comes to a stop and changes direction. Therefore, the answer is D.

Question 18

The area under a curve in a velocity versus time graph gives

Accepted Answer

The area under a curve in a velocity versus time graph gives the displacement of the object.

Question 19

Which of the following graphs represent an object having zero acceleration? 
(a)

(b)

(c)

(d)

Accepted Answer

The answer of Which of the following graphs represent an...

Question 20

A polar bear starts at the North Pole.It travels 1.0 km south,then 1.0 km east,and then 1.0 km north to return to its starting point.This trip takes 45 min.What was the bear's average velocity?

Accepted Answer

The bear ends up at its starting point, so the displacement is zero. Average velocity is displacement divided by time, and since displacement is zero, the average velocity is also zero.

Quiz 2: Kinematics: Motion in One Dimension

A child standing on a bridge throws a rock straight down.The rock leaves the child's hand at time t = 0 s.If we take upward as the positive direction,which of the graphs shown below best represents the acceleration of the stone as a function of time?

A motorist travels 160 km at 80 km/h and 160 km at 100 km/h.What is the average speed of the motorist for this trip?

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 10⁸ m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)

What must be your average speed in order to travel 350 km in 5.15 h?

The motion of a particle is described in the velocity vs.time graph shown in the figure. Over the nine-second interval shown,we can say that the speed of the particle

A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min.What was the average speed of the runner in m/s?

A child standing on a bridge throws a rock straight down.The rock leaves the child's hand at time t = 0 s.If we take upward as the positive direction,which of the graphs shown below best represents the velocity of the stone as a function of time?

The graph in the figure shows the position of an object as a function of time.The letters H-L represent particular moments of time. (a)At which moment in time is the speed of the object the greatest? (b)At which moment in time is the speed of the object equal to zero?

The figure shows a graph of the position x of two cars,C and D,as a function of time t. According to this graph,which statements about these cars must be true? (There could be more than one correct choice.)

If you run a complete loop around an outdoor track of length 400 m in 100 s,find your (a)average velocity and (b)average speed.

Which of the following graphs represent an object at rest? (There could be more than one correct choice.) (a) (b) (c) (d) (e)

A polar bear starts at the North Pole.It travels 1.0 km south,then 1.0 km east,and then 1.0 km north to return to its starting point.This trip takes 45 min.What was the bear's average speed?

If,in the figure,you start from the Bakery,travel to the Cafe,and then to the Art Gallery (a)what distance you have traveled? (b)what is your displacement?

You are driving home on a weekend from school at 55 mi/h for 110 miles.It then starts to snow and you slow to 35 mi/h.You arrive home after driving 4 hours and 15 minutes.How far is your hometown from school?

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s,how far do you travel during this inattentive period?

The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure.The two vehicles are initially alongside each other at time t = 0. At time T,what is true of the distances traveled by the vehicles since time t = 0?

The graph in the figure shows the position of a particle as it travels along the x-axis. At what value of t is the speed of the particle equal to 0 m/s?

The area under a curve in a velocity versus time graph gives

Which of the following graphs represent an object having zero acceleration? (a) (b) (c) (d)

A polar bear starts at the North Pole.It travels 1.0 km south,then 1.0 km east,and then 1.0 km north to return to its starting point.This trip takes 45 min.What was the bear's average velocity?

Quiz 2: Kinematics: Motion in One Dimension

A child standing on a bridge throws a rock straight down.The rock leaves the child's hand at time t = 0 s.If we take upward as the positive direction,which of the graphs shown below best represents the acceleration of the stone as a function of time?

A motorist travels 160 km at 80 km/h and 160 km at 100 km/h.What is the average speed of the motorist for this trip?

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 108 m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)

What must be your average speed in order to travel 350 km in 5.15 h?

The motion of a particle is described in the velocity vs.time graph shown in the figure. Over the nine-second interval shown,we can say that the speed of the particle

A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min.What was the average speed of the runner in m/s?

A child standing on a bridge throws a rock straight down.The rock leaves the child's hand at time t = 0 s.If we take upward as the positive direction,which of the graphs shown below best represents the velocity of the stone as a function of time?

The graph in the figure shows the position of an object as a function of time.The letters H-L represent particular moments of time. (a)At which moment in time is the speed of the object the greatest? (b)At which moment in time is the speed of the object equal to zero?

The figure shows a graph of the position x of two cars,C and D,as a function of time t. According to this graph,which statements about these cars must be true? (There could be more than one correct choice.)

If you run a complete loop around an outdoor track of length 400 m in 100 s,find your (a)average velocity and (b)average speed.

Which of the following graphs represent an object at rest? (There could be more than one correct choice.) (a) (b) (c) (d) (e)

A polar bear starts at the North Pole.It travels 1.0 km south,then 1.0 km east,and then 1.0 km north to return to its starting point.This trip takes 45 min.What was the bear's average speed?

If,in the figure,you start from the Bakery,travel to the Cafe,and then to the Art Gallery (a)what distance you have traveled? (b)what is your displacement?

You are driving home on a weekend from school at 55 mi/h for 110 miles.It then starts to snow and you slow to 35 mi/h.You arrive home after driving 4 hours and 15 minutes.How far is your hometown from school?

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s,how far do you travel during this inattentive period?

The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure.The two vehicles are initially alongside each other at time t = 0. At time T,what is true of the distances traveled by the vehicles since time t = 0?

The graph in the figure shows the position of a particle as it travels along the x-axis. At what value of t is the speed of the particle equal to 0 m/s?

The area under a curve in a velocity versus time graph gives

Which of the following graphs represent an object having zero acceleration? (a) (b) (c) (d)

A polar bear starts at the North Pole.It travels 1.0 km south,then 1.0 km east,and then 1.0 km north to return to its starting point.This trip takes 45 min.What was the bear's average velocity?

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 10⁸ m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)