Starting at time t = 0, an object moves along a straight line with velocity in m/s given by v(t) = 98 - 2t2, where t is in seconds. When it momentarily stops its acceleration is:

A) 0 B) -4.0 m/s2 C) -9.8 m/s2 D) -28 m/s2 E) 49 m/s2 A) 0 B) -4.0 m/s2 C) -9.8 m/s2 D) -28 m/s2 E) 49 m/s2

A freely falling body has a constant acceleration of 9.8 m/s2. This means that:

A) the body falls 9.8 m during each second B) the body falls 9.8 m during the first second C) the speed of the body increases by 9.8 m/s during each second D) the acceleration of the body increases by 9.8 m/s2 during each second E) the acceleration of the body decreases by 9.8 m/s2 during each second A) the body falls 9.8 m during each second B) the body falls 9.8 m during the first second C) the speed of the body increases by 9.8 m/s during each second D) the acceleration of the body increases by 9.8 m/s2 during each second E) the acceleration of the body decreases by 9.8 m/s2 during each second

An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is 19.6 m/s2. The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect friction.

A) half B) C) twice D) four times E) cannot be calculated from the given data A) half B) C) twice D) four times E) cannot be calculated from the given data

Over a short interval near time t = 0 the coordinate of an automobile in meters is given by x(t) = 27t - 4.0t3, where t is in seconds. At the end of 1.0 s the acceleration of the auto is:

A) 27 m/s2 B) 4.0 m/s2 C) -4.0 m/s2 D) -12 m/s2 E) -24 m/s2 A) 27 m/s2 B) 4.0 m/s2 C) -4.0 m/s2 D) -12 m/s2 E) -24 m/s2

An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s2 its distance above ground level 6.0 s later is:

A) 0.00 m B) 270 m C) 330 m D) 480 m E) none of these A) 0.00 m B) 270 m C) 330 m D) 480 m E) none of these

Starting at time t = 0, an object moves along a straight line. Its coordinate in meters is given by x(t) = 75t - 1.0t3, where t is in seconds. When it momentarily stops its acceleration is:

A) 0 B) -73 m/s2 C) -30 m/s2 D) -9.8 m/s2 E) 9.2* 103 m/s2 A) 0 B) -73 m/s2 C) -30 m/s2 D) -9.8 m/s2 E) 9.2* 103 m/s2

Exam 2: Motion Along a Straight Line

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Starting at time t = 0, an object moves along a straight line with velocity in m/s given by v(t) = 98 - 2t², where t is in seconds. When it momentarily stops its acceleration is:

(Multiple Choice)

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Question 61

Which of the following five acceleration versus time graphs is correct for an object moving in a straight line at a constant velocity of 20 m/s?

(Multiple Choice)

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Question 62

A freely falling body has a constant acceleration of 9.8 m/s². This means that:

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Question 63

Each of four particles move along an x axis. Their coordinates (in meters) as functions of time (in seconds) are given by Which of these particles is speeding up for t > 0?

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Question 64

The diagram shows a velocity-time graph for a car moving in a straight line. At point P the car must be:

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Question 65

Which of the following five coordinate versus time graphs represents the motion of an object moving with a constant speed?

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Question 66

An elevator is moving upward with constant acceleration. The dashed curve shows the position y of the ceiling of the elevator as a function of the time t. At the instant indicated by the dot, a bolt breaks loose and drops from the ceiling. Which curve best represents the position of the bolt as a function of time?

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Question 67

An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is 19.6 m/s². The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect friction.

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Question 68

At time t = 0 a car has a velocity of 16 m/s. It slows down with an acceleration given by -0.50t, in m/s² for t in seconds. It stops at t =

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Question 69

The acceleration of an object, starting from rest, is shown in the graph below. Other than at t = 0, when is the velocity of the object equal to zero?

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Question 70

Consider the following five graphs (note the axes carefully). Which of these represent(s) motion at constant speed?

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Question 71

Over a short interval near time t = 0 the coordinate of an automobile in meters is given by x(t) = 27t - 4.0t³, where t is in seconds. At the end of 1.0 s the acceleration of the auto is:

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Question 72

A stone is dropped from a cliff. The graph (carefully note the axes) that best represents its motion while it falls is:

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Question 73

Of the following situations, which one is impossible?

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Question 74

Throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration might be:

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Question 75

An object is thrown vertically into the air. Which of the following five graphs represents the velocity (v) of the object as a function of the time (t)? The positive direction is taken to be upward.

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Question 76

An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s² its distance above ground level 6.0 s later is:

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Question 77

Starting at time t = 0, an object moves along a straight line. Its coordinate in meters is given by x(t) = 75t - 1.0t³, where t is in seconds. When it momentarily stops its acceleration is:

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Question 78

A stone is released from a balloon that is descending at a constant speed of 10 m/s. Neglecting air resistance, after 20 s the speed of the stone is:

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Question 79

Showing 61 - 79 of 79

Exam 2: Motion Along a Straight Line

Starting at time t = 0, an object moves along a straight line with velocity in m/s given by v(t) = 98 - 2t2, where t is in seconds. When it momentarily stops its acceleration is:

Which of the following five acceleration versus time graphs is correct for an object moving in a straight line at a constant velocity of 20 m/s?

A freely falling body has a constant acceleration of 9.8 m/s2. This means that:

Each of four particles move along an x axis. Their coordinates (in meters) as functions of time (in seconds) are given by Which of these particles is speeding up for t > 0?

The diagram shows a velocity-time graph for a car moving in a straight line. At point P the car must be:

Which of the following five coordinate versus time graphs represents the motion of an object moving with a constant speed?

An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is 19.6 m/s2. The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect friction.

At time t = 0 a car has a velocity of 16 m/s. It slows down with an acceleration given by -0.50t, in m/s2 for t in seconds. It stops at t =

The acceleration of an object, starting from rest, is shown in the graph below. Other than at t = 0, when is the velocity of the object equal to zero?

Consider the following five graphs (note the axes carefully). Which of these represent(s) motion at constant speed?

Over a short interval near time t = 0 the coordinate of an automobile in meters is given by x(t) = 27t - 4.0t3, where t is in seconds. At the end of 1.0 s the acceleration of the auto is:

A stone is dropped from a cliff. The graph (carefully note the axes) that best represents its motion while it falls is:

Of the following situations, which one is impossible?

Throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration might be:

An object is thrown vertically into the air. Which of the following five graphs represents the velocity (v) of the object as a function of the time (t)? The positive direction is taken to be upward.

An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s2 its distance above ground level 6.0 s later is:

Starting at time t = 0, an object moves along a straight line. Its coordinate in meters is given by x(t) = 75t - 1.0t3, where t is in seconds. When it momentarily stops its acceleration is:

A stone is released from a balloon that is descending at a constant speed of 10 m/s. Neglecting air resistance, after 20 s the speed of the stone is:

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Starting at time t = 0, an object moves along a straight line with velocity in m/s given by v(t) = 98 - 2t², where t is in seconds. When it momentarily stops its acceleration is:

A freely falling body has a constant acceleration of 9.8 m/s². This means that:

An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is 19.6 m/s². The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect friction.

At time t = 0 a car has a velocity of 16 m/s. It slows down with an acceleration given by -0.50t, in m/s² for t in seconds. It stops at t =

Over a short interval near time t = 0 the coordinate of an automobile in meters is given by x(t) = 27t - 4.0t³, where t is in seconds. At the end of 1.0 s the acceleration of the auto is:

An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s² its distance above ground level 6.0 s later is:

Starting at time t = 0, an object moves along a straight line. Its coordinate in meters is given by x(t) = 75t - 1.0t³, where t is in seconds. When it momentarily stops its acceleration is: