John throws a rock down with speed 14 m/s from the top of a 30-m tower.If g = 9.8 m/s2 and air resistance is negligible, what is the rock's speed just as it hits the ground?

A) 12 m/s B) 28 m/s C) 350 m/s D) 784 m/s A) 12 m/s B) 28 m/s C) 350 m/s D) 784 m/s

Gwen releases a rock at rest from the top of a 40-m tower.If g = 9.8 m/s2 and air resistance is negligible, what is the speed of the rock as it hits the ground?

A) 28 m/s B) 30 m/s C) 56 m/s D) 784 m/s A) 28 m/s B) 30 m/s C) 56 m/s D) 784 m/s

Exam 2: Motion in One Dimension

Norma releases a bowling ball from rest; it rolls down a ramp with constant acceleration.After half a second it has traveled 0.75 m.How far has it traveled after two seconds?

(Multiple Choice)

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Question 21

Changing the positive direction in a reference frame to the opposite direction does not change the sign of which of the following quantities?

(Multiple Choice)

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Question 22

The value of an object's acceleration may be characterized in equivalent words by which of the following?

(Multiple Choice)

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Question 23

A strobe photograph of a car moving along a straight road shows the interval between each successive image to be diminishing.If the direction of motion of the car is taken as positive, which of the following are negative?

(Multiple Choice)

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Question 24

A cheetah can maintain its maximum speed of 100 km/hr for 30.0 seconds.What minimum distance must a gazelle running 80.0 km/hr be ahead of the cheetah to escape?

(Multiple Choice)

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Question 25

John throws a rock down with speed 14 m/s from the top of a 30-m tower.If g = 9.8 m/s² and air resistance is negligible, what is the rock's speed just as it hits the ground?

(Multiple Choice)

4.8/5

(38)

Question 26

A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 8.00 s.What distance will the sports car travel during the 8 s acceleration period? (Hint: First convert speed to m/s.)

(Multiple Choice)

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Question 27

Human reaction time is usually about 0.20 s.If your lab partner holds a ruler between your finger and thumb and releases it without warning, how far can you expect the ruler to fall before you catch it? The nearest value is:

(Multiple Choice)

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Question 28

The slope of the acceleration vs.time curve represents:

(Multiple Choice)

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Question 29

An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 10.0 s.What distance does the car travel?

(Multiple Choice)

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Question 30

A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11 s.What is the final velocity after 11 s?

(Multiple Choice)

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Question 31

An object is dropped from a height.Once it is moving, which of the following statements is true, at least at one point?

(Multiple Choice)

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Question 32

A railroad train travels forward along a straight track at 80.0 m/s for 1 000 m and then travels at 50.0 m/s for the next 1 000 m.What is the average velocity?

(Multiple Choice)

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Question 33

Which of the following is not a vector quantity?

(Multiple Choice)

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Question 34

On a position versus time graph, the slope of the straight line joining two points on the plotted curve that are separated in time by the interval Dt, is which of the following quantities?

(Multiple Choice)

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Question 35

A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr.If both animals are running at full speed, with the gazelle 70.0 m ahead, how long before the cheetah catches its prey?

(Multiple Choice)

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Question 36

A vehicle designed to operate on a drag strip accelerates from zero to 30 m/s while undergoing a straight line path displacement of 45 m.What is the vehicle's acceleration if its value may be assumed to be constant?

(Multiple Choice)

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Question 37

A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11 s.What is the average velocity?

(Multiple Choice)

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Question 38

A Cessna aircraft has a lift-off speed of 120 km/hr.What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240 m?

(Multiple Choice)

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Question 39

Gwen releases a rock at rest from the top of a 40-m tower.If g = 9.8 m/s² and air resistance is negligible, what is the speed of the rock as it hits the ground?

(Multiple Choice)

4.8/5

(37)

Question 40

Showing 21 - 40 of 63

Exam 2: Motion in One Dimension

Norma releases a bowling ball from rest; it rolls down a ramp with constant acceleration.After half a second it has traveled 0.75 m.How far has it traveled after two seconds?

Changing the positive direction in a reference frame to the opposite direction does not change the sign of which of the following quantities?

The value of an object's acceleration may be characterized in equivalent words by which of the following?

A strobe photograph of a car moving along a straight road shows the interval between each successive image to be diminishing.If the direction of motion of the car is taken as positive, which of the following are negative?

A cheetah can maintain its maximum speed of 100 km/hr for 30.0 seconds.What minimum distance must a gazelle running 80.0 km/hr be ahead of the cheetah to escape?

John throws a rock down with speed 14 m/s from the top of a 30-m tower.If g = 9.8 m/s2 and air resistance is negligible, what is the rock's speed just as it hits the ground?

A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 8.00 s.What distance will the sports car travel during the 8 s acceleration period? (Hint: First convert speed to m/s.)

Human reaction time is usually about 0.20 s.If your lab partner holds a ruler between your finger and thumb and releases it without warning, how far can you expect the ruler to fall before you catch it? The nearest value is:

The slope of the acceleration vs.time curve represents:

An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 10.0 s.What distance does the car travel?

A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11 s.What is the final velocity after 11 s?

An object is dropped from a height.Once it is moving, which of the following statements is true, at least at one point?

A railroad train travels forward along a straight track at 80.0 m/s for 1 000 m and then travels at 50.0 m/s for the next 1 000 m.What is the average velocity?

Which of the following is not a vector quantity?

On a position versus time graph, the slope of the straight line joining two points on the plotted curve that are separated in time by the interval Dt, is which of the following quantities?

A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr.If both animals are running at full speed, with the gazelle 70.0 m ahead, how long before the cheetah catches its prey?

A vehicle designed to operate on a drag strip accelerates from zero to 30 m/s while undergoing a straight line path displacement of 45 m.What is the vehicle's acceleration if its value may be assumed to be constant?

A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11 s.What is the average velocity?

A Cessna aircraft has a lift-off speed of 120 km/hr.What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240 m?

Gwen releases a rock at rest from the top of a 40-m tower.If g = 9.8 m/s2 and air resistance is negligible, what is the speed of the rock as it hits the ground?

Introduction

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The Laws of Motion

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John throws a rock down with speed 14 m/s from the top of a 30-m tower.If g = 9.8 m/s² and air resistance is negligible, what is the rock's speed just as it hits the ground?

Gwen releases a rock at rest from the top of a 40-m tower.If g = 9.8 m/s² and air resistance is negligible, what is the speed of the rock as it hits the ground?