Question 1

FIGURE 2-7 
-Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. At what value of t is the instantaneous acceleration equal to zero?

Accepted Answer

The answer of FIGURE 2-7 
-Fig. 2-7 represents the velocity...

Question 2

A man walks south at a speed of 2.00 m/s for 30.0 minutes. He then turns around and walks north a distance 6000 m in 15.0 minutes. What is the displacement of the man from his starting position?
A)1800 m north
B)3600 m south
C)5940 m south
D)4200 m south
E)2400 m north

Accepted Answer

The man walks south for 30 minutes at 2.00 m/s, covering 3600 m south. Then he walks north 6000 m. The net displacement is 6000 m north - 3600 m south = 2400 m north.

Question 3

FIGURE 2-7 
-Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. What is the average acceleration of the particle between t = 2 s and t = 4 s?

Accepted Answer

The answer of FIGURE 2-7 
-Fig. 2-7 represents the velocity...

Question 4

A ball is thrown straight up with a speed of 30 m/s.
(a.) How long does it take the ball to reach the maximum height?
(b.) What is the maximum height reached by the ball?
(c.) What is its speed after 4.2 s?

Accepted Answer

The answer of A ball is thrown straight up with...

Question 5

A foul ball is hit straight up into the air with a speed of 30.0 m/s.
(a.) Calculate the time required for the ball to rise to its maximum height.
(b.) Calculate the maximum height reached by the ball.
(c.) Determine the time at which the ball pass a point 25.0 m above the point of contact between the bat and ball.
(d.) Explain why there are two answers to part c.

Accepted Answer

The answer of A foul ball is hit straight up...

Question 6

FIGURE 2-7 
-Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. In what direction is the acceleration at t = 0.5 s?

Accepted Answer

The answer of FIGURE 2-7 
-Fig. 2-7 represents the velocity...

Question 7

FIGURE 2-10 
-Fig. 2-10 shows the position of an object as a function of time. What is the displacement of the object between time  and time t = 9.0 s?
A)3.0 m
B)19.5 m
C)5.0 m
D)1.0 m
E)-1.0 m

Accepted Answer

The answer of FIGURE 2-10 
-Fig. 2-10 shows the position...

Question 8

FIGURE 2-10 
-Fig. 2-10 shows the position of an object as a function of time. What is the average speed of the object between time  and time t = 9.0 s?
A)0.11 m/s
B)-0.33 m/s
C)0.33 m/s
D)0.56 m/s
E)-0.11 m/s

Accepted Answer

The answer of FIGURE 2-10 
-Fig. 2-10 shows the position...

Question 9

FIGURE 2-10 
-Fig. 2-10 shows the position of an object as a function of time. What is the length of the path the object followed during the time interval from time t = 0.0 s and time t = 9.0 s?
A)-1.0 m
B)3.0 m
C)1.0 m
D)19.5 m
E)5.0 m

Accepted Answer

The answer of FIGURE 2-10 
-Fig. 2-10 shows the position...

Question 10

The position of an object is given as a function of time as x(t) = (3.00 m/s)t + (2.00 m/s²)t². What is the displacement of the object between t = 4.00 s and t = 5.00 s? A)8.00 m B)5.00 m C)21.0 m D)65.0 m E)44.0 m

Accepted Answer

The answer of The position of an object is given...

Question 11

A man walks south at a speed of 2.00 m/s for 15.0 minutes. He then turns around and walks north a distance 2000 m in 15.0 minutes. What is the average speed of the man during his entire motion?
A)1.89 m/s
B)3.35 m/s
C)3.21 m/s
D)2.82 m/s
E)2.11 m/s

Accepted Answer

The total distance traveled is 1800 m south (2 m/s * 900 s) and 2000 m north, totaling 3800 m. The total time is 1800 s (15 min south + 15 min north). Average speed = total distance / total time = 3800 m / 1800 s = 2.11 m/s.

Question 12

A car with good tires on a dry road can decelerate at about 5.0 m/s² when braking. Suppose a car is initially traveling at 55 mi/h. (a.) How much time does it take the car to stop? (b.) What is the stopping distance?

Accepted Answer

The answer of A car with good tires on a...

Question 13

FIGURE 2-8 
-Fig. 2-8 shows the velocity-versus-time graph for a basketball player traveling up and down the court in a straight-line path. Find the displacement of the player for each of the segments A, B, C and D.

Accepted Answer

The answer of FIGURE 2-8 
-Fig. 2-8 shows the velocity-versus-time...

Question 14

A person walks in a distance x northward, turns around and walks a distance 7.00x southward. If the total displacement of the person from his starting position is 400 m south. What was the total distance walked?
A)421 m
B)457 m
C)515 m
D)533 m
E)400 m

Accepted Answer

The answer of A person walks in a distance x...

Question 15

A man walks south at a speed of 2.00 m/s for 60.0 minutes. He then turns around and walks north a distance 3000 m in 25.0 minutes. What is the average velocity of the man during his entire motion?
A)0.824 m/s south
B)1.93 m/s south
C)2.00 m/s south
D)1.79 m/s south
E)800 m/s south

Accepted Answer

The answer of A man walks south at a speed...

Question 16

FIGURE 2-9 
-Refer to Fig. 2-9. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the distance you have traveled?
A)6.5 km
B)2.5 km
C)10.5 km
D)0 km
E)1.5 km

Accepted Answer

The distance from the Bakery to the Cafe is 2.5 km, and the distance from the Cafe to the Art Gallery is 8 km. So, the total distance traveled is 2.5 km + 8 km = 10.5 km.

Question 17

FIGURE 2-7 
-Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. In what direction is the acceleration at t = 3.0 s?

Accepted Answer

The answer of FIGURE 2-7 
-Fig. 2-7 represents the velocity...

Question 18

At the instant a traffic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s². At that moment a truck traveling with a constant velocity of 15.0 m/s overtakes and passes the car. (a.) Calculate the time necessary for the car to reach the truck. (b.) Calculate the distance beyond the traffic light that the car will pass the truck. (c.) Determine the speed of the car when it passes the truck.

Accepted Answer

The answer of At the instant a traffic light turns...

Question 19

FIGURE 2-9 
-Refer to Fig. 2-9. If you start from the Bakery, travel to the Art Gallery, and then to the Cafe, in 1.0 hour, what is your average speed?
A)6.5 km/hr
B)2.5 km/hr
C)9.0 km/hr
D)10.5 km/hr
E)1.5 km/hr

Accepted Answer

Average speed = Total distance / Total time = 6 km / 1 hr = 6 km/hr

Question 20

FIGURE 2-9 
-Refer to Fig. 2-9. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the magnitude of your displacement?
A)6.5 km
B)2.5 km
C)10.5 km
D)9.0 km
E)1.5 km

Accepted Answer

Displacement is the straight-line distance between the starting point and the final point, regardless of the path taken. Assuming the Bakery, Cafe, and Art Gallery form a triangle, the displacement is the direct distance from the Bakery to the Art Gallery, which is 2.5 km.

Quiz 2: Describing Motion: Kinematics in One Dimension

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. At what value of t is the instantaneous acceleration equal to zero?

A man walks south at a speed of 2.00 m/s for 30.0 minutes. He then turns around and walks north a distance 6000 m in 15.0 minutes. What is the displacement of the man from his starting position?

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. What is the average acceleration of the particle between t = 2 s and t = 4 s?

A ball is thrown straight up with a speed of 30 m/s. (a.) How long does it take the ball to reach the maximum height? (b.) What is the maximum height reached by the ball? (c.) What is its speed after 4.2 s?

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. In what direction is the acceleration at t = 0.5 s?

FIGURE 2-10 -Fig. 2-10 shows the position of an object as a function of time. What is the displacement of the object between time and time t = 9.0 s?

FIGURE 2-10 -Fig. 2-10 shows the position of an object as a function of time. What is the average speed of the object between time and time t = 9.0 s?

FIGURE 2-10 -Fig. 2-10 shows the position of an object as a function of time. What is the length of the path the object followed during the time interval from time t = 0.0 s and time t = 9.0 s?

The position of an object is given as a function of time as x(t) = (3.00 m/s) t + (2.00 m/s²) t². What is the displacement of the object between t = 4.00 s and t = 5.00 s?

A man walks south at a speed of 2.00 m/s for 15.0 minutes. He then turns around and walks north a distance 2000 m in 15.0 minutes. What is the average speed of the man during his entire motion?

A car with good tires on a dry road can decelerate at about 5.0 m/s² when braking. Suppose a car is initially traveling at 55 mi/h. (a.) How much time does it take the car to stop? (b.) What is the stopping distance?

FIGURE 2-8 -Fig. 2-8 shows the velocity-versus-time graph for a basketball player traveling up and down the court in a straight-line path. Find the displacement of the player for each of the segments A, B, C and D.

A person walks in a distance x northward, turns around and walks a distance 7.00x southward. If the total displacement of the person from his starting position is 400 m south. What was the total distance walked?

A man walks south at a speed of 2.00 m/s for 60.0 minutes. He then turns around and walks north a distance 3000 m in 25.0 minutes. What is the average velocity of the man during his entire motion?

FIGURE 2-9 -Refer to Fig. 2-9. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the distance you have traveled?

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. In what direction is the acceleration at t = 3.0 s?

FIGURE 2-9 -Refer to Fig. 2-9. If you start from the Bakery, travel to the Art Gallery, and then to the Cafe, in 1.0 hour, what is your average speed?

FIGURE 2-9 -Refer to Fig. 2-9. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the magnitude of your displacement?

Quiz 2: Describing Motion: Kinematics in One Dimension

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. At what value of t is the instantaneous acceleration equal to zero?

A man walks south at a speed of 2.00 m/s for 30.0 minutes. He then turns around and walks north a distance 6000 m in 15.0 minutes. What is the displacement of the man from his starting position?

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. What is the average acceleration of the particle between t = 2 s and t = 4 s?

A ball is thrown straight up with a speed of 30 m/s. (a.) How long does it take the ball to reach the maximum height? (b.) What is the maximum height reached by the ball? (c.) What is its speed after 4.2 s?

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. In what direction is the acceleration at t = 0.5 s?

FIGURE 2-10 -Fig. 2-10 shows the position of an object as a function of time. What is the displacement of the object between time and time t = 9.0 s?

FIGURE 2-10 -Fig. 2-10 shows the position of an object as a function of time. What is the average speed of the object between time and time t = 9.0 s?

FIGURE 2-10 -Fig. 2-10 shows the position of an object as a function of time. What is the length of the path the object followed during the time interval from time t = 0.0 s and time t = 9.0 s?

The position of an object is given as a function of time as x(t) = (3.00 m/s) t + (2.00 m/s2) t2. What is the displacement of the object between t = 4.00 s and t = 5.00 s?

A man walks south at a speed of 2.00 m/s for 15.0 minutes. He then turns around and walks north a distance 2000 m in 15.0 minutes. What is the average speed of the man during his entire motion?

A car with good tires on a dry road can decelerate at about 5.0 m/s2 when braking. Suppose a car is initially traveling at 55 mi/h. (a.) How much time does it take the car to stop? (b.) What is the stopping distance?

FIGURE 2-8 -Fig. 2-8 shows the velocity-versus-time graph for a basketball player traveling up and down the court in a straight-line path. Find the displacement of the player for each of the segments A, B, C and D.

A person walks in a distance x northward, turns around and walks a distance 7.00x southward. If the total displacement of the person from his starting position is 400 m south. What was the total distance walked?

A man walks south at a speed of 2.00 m/s for 60.0 minutes. He then turns around and walks north a distance 3000 m in 25.0 minutes. What is the average velocity of the man during his entire motion?

FIGURE 2-9 -Refer to Fig. 2-9. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the distance you have traveled?

FIGURE 2-7 -Fig. 2-7 represents the velocity of a particle as it travels along the x-axis. In what direction is the acceleration at t = 3.0 s?

FIGURE 2-9 -Refer to Fig. 2-9. If you start from the Bakery, travel to the Art Gallery, and then to the Cafe, in 1.0 hour, what is your average speed?

FIGURE 2-9 -Refer to Fig. 2-9. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the magnitude of your displacement?

The position of an object is given as a function of time as x(t) = (3.00 m/s) t + (2.00 m/s²) t². What is the displacement of the object between t = 4.00 s and t = 5.00 s?

A car with good tires on a dry road can decelerate at about 5.0 m/s² when braking. Suppose a car is initially traveling at 55 mi/h. (a.) How much time does it take the car to stop? (b.) What is the stopping distance?