The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt2.The dimensions of the quantities a and b are respectively:

A) L2/T, L3/T2 B) L/T2, L2/T C) L/T, L/T2 D) L3/T, T2/L E) none of these A) L2/T, L3/T2 B) L/T2, L2/T C) L/T, L/T2 D) L3/T, T2/L E) none of these

The coordinate of an object is given as a function of time by x = 4t2 - 3t3, where x is in meters and t is in seconds.Its average acceleration over the interval from t = 0 to t = 2 s is:

A) -8 m/s2 B) 4 m/s2 C) -10 m/s2 D) 10 m/s2 E) -13 m/s2 A) -8 m/s2 B) 4 m/s2 C) -10 m/s2 D) 10 m/s2 E) -13 m/s2

Exam 2: Motion Along a Straight Line

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The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt².The dimensions of the quantities a and b are respectively:

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Question 81

An object is released from rest.How far does it fall during the second second of its fall?

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Question 82

One object is thrown vertically upward with an initial velocity of 100 m/s and another object with an initial velocity of 10 m/s.The maximum height reached by the first object will be _______ that of the other.

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Question 83

A ball rolls up a slope.At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0 cm/s.What is the magnitude of its average acceleration from the third to the eighth second?

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Question 84

A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h.The average speed of the car for this 80 km trip is:

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Question 85

You leave your house and drive to your friend's house, where you stay a while.Then you come back home.Which of the following must be true of your trip?

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Question 86

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?

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Question 87

A racing car traveling with constant acceleration increases its speed from 10 m/s to 30 m/s over a distance of 60 m? How long does this take?

(Multiple Choice)

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Question 88

A baseball is thrown vertically into the air.The acceleration of the ball at its highest point is:

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Question 89

The coordinate of an object is given as a function of time by x = 4t² - 3t³, where x is in meters and t is in seconds.Its average acceleration over the interval from t = 0 to t = 2 s is:

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Question 90

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Exam 2: Motion Along a Straight Line

The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt2.The dimensions of the quantities a and b are respectively:

An object is released from rest.How far does it fall during the second second of its fall?

One object is thrown vertically upward with an initial velocity of 100 m/s and another object with an initial velocity of 10 m/s.The maximum height reached by the first object will be _______ that of the other.

A ball rolls up a slope.At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0 cm/s.What is the magnitude of its average acceleration from the third to the eighth second?

A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h.The average speed of the car for this 80 km trip is:

You leave your house and drive to your friend's house, where you stay a while.Then you come back home.Which of the following must be true of your trip?

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 racing car traveling with constant acceleration increases its speed from 10 m/s to 30 m/s over a distance of 60 m? How long does this take?

A baseball is thrown vertically into the air.The acceleration of the ball at its highest point is:

The coordinate of an object is given as a function of time by x = 4t2 - 3t3, where x is in meters and t is in seconds.Its average acceleration over the interval from t = 0 to t = 2 s is:

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The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt².The dimensions of the quantities a and b are respectively:

The coordinate of an object is given as a function of time by x = 4t² - 3t³, where x is in meters and t is in seconds.Its average acceleration over the interval from t = 0 to t = 2 s is: