A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s2 in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision?

A) 29.2 km/h B) 44.8 km/h C) 97.2 km/h D) 105 km/h E) 144 km/h A) 29.2 km/h B) 44.8 km/h C) 97.2 km/h D) 105 km/h E) 144 km/h

Alexa's hair grows with an average speed of 3.5 × 10-9 m/s. How long does it take her hair to grow 0.30 m? Note: 1 yr = 3.156 × 107 s.

A) 1.9 yr B) 1.3 yr C) 0.37 yr D) 5.4 yr E) 2.7 yr A) 1.9 yr B) 1.3 yr C) 0.37 yr D) 5.4 yr E) 2.7 yr

Exam 2: Kinematics in One Dimension

In a race, Marcos runs 1.00 mile in 4.02 min, mounts a bicycle, and rides back to his starting point, which is also the finish line, in 3.02 min. What is the magnitude of Marcos' average velocity for the race?

(Multiple Choice)

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Question 41

A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s² in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision?

(Multiple Choice)

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Question 42

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder. -What is the speed of the object 3.0 seconds after it is dropped?

(Multiple Choice)

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Question 43

Alexa's hair grows with an average speed of 3.5 × 10^-⁹m/s. How long does it take her hair to grow 0.30 m? Note: 1 yr = 3.156 × 10⁷s.

(Multiple Choice)

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Question 44

A landing airplane makes contact with the runway with a speed of 75.0 m/s and moves toward the south. After 18.5 seconds, the airplane comes to rest. What is the average acceleration of the airplane during the landing?

(Multiple Choice)

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Question 45

A tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t = 0 s. -Approximately how long does it take the tennis ball to reach its maximum height?

(Multiple Choice)

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Question 46

An object is moving along a straight line. The graph shows the object's position from the starting point as a function of time. -At which time or times does the object reverse its direction of motion?

(Multiple Choice)

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Question 47

For which one of the following situations will the path length equal the magnitude of the displacement?

(Multiple Choice)

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Question 48

A racecar, traveling at constant speed, makes one lap around a circular track of radius r in a time t. Note: The circumference of a circle is given by C=2πr. -Which one of the following statements concerning this car is true?

(Multiple Choice)

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Question 49

An object starts from rest and accelerates uniformly in a straight line in the positive x direction. After 11 seconds, its speed is 70.0 m/s. -Determine the acceleration of the object.

(Multiple Choice)

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Question 50

The rate at which the acceleration of an object changes with time is called a jerk. What is the dimension of the jerk?

(Multiple Choice)

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Question 51

The graph shows the height versus time of an object. Estimate the instantaneous velocity, in m/s, of the object at time t = 15 min.

(Multiple Choice)

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Question 52

A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s. -How long does it take the ball to reach its maximum height?

(Multiple Choice)

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Question 53

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder. -What is the numerical value of the slope of the line?

(Multiple Choice)

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Question 54

An object is moving along a straight line. The graph shows the object's velocity as a function of time. -What is the acceleration of the object in the interval from t = 5 s to t = 6 s?

(Multiple Choice)

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Question 55

A automotive test driver travels due north in a prototype hybrid vehicle at 30 mi/h for 2 hours. She then reverses her direction and travels due south at 60 mi/h for 1 hour. -What is the average velocity of the vehicle?

(Multiple Choice)

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Question 56

A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s. -How long is the ball in the air when it returns to its original position?

(Multiple Choice)

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Question 57

A ball is shot straight up from the surface of the earth with an initial speed of 19.6 m/s. Neglect any effects due to air resistance. -How much time elapses between the throwing of the ball and its return to the original launch point?

(Multiple Choice)

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Question 58

A racecar, traveling at constant speed, makes one lap around a circular track of radius r in a time t. Note: The circumference of a circle is given by C=2πr. -Determine the magnitude of the average velocity of the car for one complete lap.

(Multiple Choice)

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Question 59

A small object is released from rest and falls 1.00 × 10² feet near the surface of the earth. Neglect air resistance. -Approximately how fast will the object be moving after falling through the 1.00 × 10² feet mentioned?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 103

Exam 2: Kinematics in One Dimension

In a race, Marcos runs 1.00 mile in 4.02 min, mounts a bicycle, and rides back to his starting point, which is also the finish line, in 3.02 min. What is the magnitude of Marcos' average velocity for the race?

A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s2 in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision?

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder. -What is the speed of the object 3.0 seconds after it is dropped?

Alexa's hair grows with an average speed of 3.5 × 10-9 m/s. How long does it take her hair to grow 0.30 m? Note: 1 yr = 3.156 × 107 s.

A landing airplane makes contact with the runway with a speed of 75.0 m/s and moves toward the south. After 18.5 seconds, the airplane comes to rest. What is the average acceleration of the airplane during the landing?

A tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t = 0 s. -Approximately how long does it take the tennis ball to reach its maximum height?

An object is moving along a straight line. The graph shows the object's position from the starting point as a function of time. -At which time or times does the object reverse its direction of motion?

For which one of the following situations will the path length equal the magnitude of the displacement?

A racecar, traveling at constant speed, makes one lap around a circular track of radius r in a time t. Note: The circumference of a circle is given by C=2πr. -Which one of the following statements concerning this car is true?

An object starts from rest and accelerates uniformly in a straight line in the positive x direction. After 11 seconds, its speed is 70.0 m/s. -Determine the acceleration of the object.

The rate at which the acceleration of an object changes with time is called a jerk. What is the dimension of the jerk?

The graph shows the height versus time of an object. Estimate the instantaneous velocity, in m/s, of the object at time t = 15 min.

A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s. -How long does it take the ball to reach its maximum height?

The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder. -What is the numerical value of the slope of the line?

An object is moving along a straight line. The graph shows the object's velocity as a function of time. -What is the acceleration of the object in the interval from t = 5 s to t = 6 s?

A automotive test driver travels due north in a prototype hybrid vehicle at 30 mi/h for 2 hours. She then reverses her direction and travels due south at 60 mi/h for 1 hour. -What is the average velocity of the vehicle?

A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s. -How long is the ball in the air when it returns to its original position?

A ball is shot straight up from the surface of the earth with an initial speed of 19.6 m/s. Neglect any effects due to air resistance. -How much time elapses between the throwing of the ball and its return to the original launch point?

A racecar, traveling at constant speed, makes one lap around a circular track of radius r in a time t. Note: The circumference of a circle is given by C=2πr. -Determine the magnitude of the average velocity of the car for one complete lap.

A small object is released from rest and falls 1.00 × 102 feet near the surface of the earth. Neglect air resistance. -Approximately how fast will the object be moving after falling through the 1.00 × 102 feet mentioned?

Introduction and Mathematical Concepts

Kinematics in Two Dimensions

Forces and Newtons Laws of Motion

Dynamics of Uniform Circular Motion

Work and Energy

Impulse and Momentum

Rotational Kinematics

Rotational Dynamics

Simple Harmonic Motion and Elasticity

Fluids

Temperature and Heat

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

Waves and Sound

The Principle of Linear Superposition and Interference Phenomena

Electric Forces and Electric Fields

Electric Potential Energy and the Electric Potential

Electric Circuits

Magnetic Forces and Magnetic Fields

Electromagnetic Induction

Alternating Current Circuits

Electromagnetic Waves

The Refl Ection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Interference and the Wave Nature of Light

Special Relativity

Particles and Waves

The Nature of the Atom

Nuclear Physics and Radioactivity

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A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 60.0 m/s² in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision?

Alexa's hair grows with an average speed of 3.5 × 10^-⁹m/s. How long does it take her hair to grow 0.30 m? Note: 1 yr = 3.156 × 10⁷s.

A small object is released from rest and falls 1.00 × 10² feet near the surface of the earth. Neglect air resistance. -Approximately how fast will the object be moving after falling through the 1.00 × 10² feet mentioned?