A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2. At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves?

A) 1.9 km B) 1.3 km C) 1.6 km D) 1.0 km E) 2.1 km A) 1.9 km B) 1.3 km C) 1.6 km D) 1.0 km E) 2.1 km

A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2. For the next 20 s, the acceleration of the particle is −1.0 cm/s2. What is the position of the particle at the end of this motion?

A) zero B) +3.0 m C) −1.0 m D) +2.0 m E) −3.0 m A) zero B) +3.0 m C) −1.0 m D) +2.0 m E) −3.0 m

A proton moving along the x axis has an initial velocity of 4.0 × 106 m/s and a constant acceleration of 6.0 × 1012 m/s2. What is the velocity of the proton after it has traveled a distance of 80 cm?

A) 5.1 × 106 m/s B) 6.3 × 106 m/s C) 4.8 × 106 m/s D) 3.9 × 106 m/s E) 2.9 × 106 m/s A) 5.1 × 106 m/s B) 6.3 × 106 m/s C) 4.8 × 106 m/s D) 3.9 × 106 m/s E) 2.9 × 106 m/s

Exam 2: One-Dimensional Motion

A boat moves at 10.0 m/s relative to the water. If the boat is in a river where the current is 2.0 m/s, how long does it take the boat to make a complete round trip of 1.00 km upstream followed by a 1.00 km trip downstream?

(Short Answer)

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Question 41

A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s². At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves?

(Multiple Choice)

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Question 42

An object is thrown downward with an initial (t = 0) speed of 10 m/s from a height of 60 m above the ground. At the same instant (t = 0), a second object is propelled vertically upward from ground level with a speed of 40 m/s. At what height above the ground will the two objects pass each other?

(Multiple Choice)

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Question 43

An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?

(Multiple Choice)

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Question 44

A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity of the particle at x = 8.0 m is 2.8 m/s. What is the acceleration during this time interval?

(Multiple Choice)

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Question 45

The velocity of a particle moving along the x axis is given for t > 0 by vx = (32.0t − 2.00t3) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction?

(Multiple Choice)

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Question 46

The graph below shows the velocity versus time graph for a ball. Which explanation best fits the motion of the ball as shown by the graph?

(Multiple Choice)

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Question 47

The position of a particle moving along the x axis is given by x = (21 + 22t − 6.0t2) m, where t is in s. What is the average velocity during the time interval t = 1.0 s to t = 3.0 s?

(Multiple Choice)

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Question 48

A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s². For the next 20 s, the acceleration of the particle is −1.0 cm/s². What is the position of the particle at the end of this motion?

(Multiple Choice)

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Question 49

The small circles in the diagram below represent the positions along the x axis of a body at equal time intervals. Assume the body moves in a straight line. This diagram is most likely to describe

(Multiple Choice)

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Question 50

When Jim and Rob ride bicycles, Jim can only accelerate at three quarters the acceleration of Rob. Both start from rest at the bottom of a long straight road with constant upward slope. If Rob takes 5.0 minutes to reach the top, how much earlier should Jim start to reach the top at the same time as Rob?

(Multiple Choice)

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Question 51

An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion.

(Multiple Choice)

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Question 52

The position of a particle moving along the x axis is given by x = 6.0t2 − 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?

(Multiple Choice)

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Question 53

An automobile traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 180 m. If the acceleration is constant, how much time elapses while the auto moves this distance?

(Multiple Choice)

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Question 54

An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object?

(Multiple Choice)

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Question 55

A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?

(Multiple Choice)

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Question 56

A proton moving along the x axis has an initial velocity of 4.0 × 106 m/s and a constant acceleration of 6.0 × 1012 m/s². What is the velocity of the proton after it has traveled a distance of 80 cm?

(Multiple Choice)

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Question 57

The equation that solves a problem is . The problem is:

(Multiple Choice)

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Question 58

Starting from rest, a car travels 1350 meters in 1.00 minute. It accelerated at 1.0 m/s² until it reached its cruising speed. Then it drove the remaining distance at constant velocity. What was its cruising speed?

(Short Answer)

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Question 59

Dallas says that any change in velocity is directly proportional to the time interval over which the change took place. Dana says that is true only when the acceleration is constant. Which one, if either, is correct?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 66

Exam 2: One-Dimensional Motion

A boat moves at 10.0 m/s relative to the water. If the boat is in a river where the current is 2.0 m/s, how long does it take the boat to make a complete round trip of 1.00 km upstream followed by a 1.00 km trip downstream?

A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2. At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves?

An object is thrown downward with an initial (t = 0) speed of 10 m/s from a height of 60 m above the ground. At the same instant (t = 0), a second object is propelled vertically upward from ground level with a speed of 40 m/s. At what height above the ground will the two objects pass each other?

An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?

A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity of the particle at x = 8.0 m is 2.8 m/s. What is the acceleration during this time interval?

The velocity of a particle moving along the x axis is given for t > 0 by vx = (32.0t − 2.00t3) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction?

The graph below shows the velocity versus time graph for a ball. Which explanation best fits the motion of the ball as shown by the graph?

The position of a particle moving along the x axis is given by x = (21 + 22t − 6.0t2) m, where t is in s. What is the average velocity during the time interval t = 1.0 s to t = 3.0 s?

A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2. For the next 20 s, the acceleration of the particle is −1.0 cm/s2. What is the position of the particle at the end of this motion?

The small circles in the diagram below represent the positions along the x axis of a body at equal time intervals. Assume the body moves in a straight line. This diagram is most likely to describe

An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion.

The position of a particle moving along the x axis is given by x = 6.0t2 − 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?

An automobile traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 180 m. If the acceleration is constant, how much time elapses while the auto moves this distance?

An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object?

A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?

A proton moving along the x axis has an initial velocity of 4.0 × 106 m/s and a constant acceleration of 6.0 × 1012 m/s2. What is the velocity of the proton after it has traveled a distance of 80 cm?

The equation that solves a problem is . The problem is:

Starting from rest, a car travels 1350 meters in 1.00 minute. It accelerated at 1.0 m/s2 until it reached its cruising speed. Then it drove the remaining distance at constant velocity. What was its cruising speed?

Dallas says that any change in velocity is directly proportional to the time interval over which the change took place. Dana says that is true only when the acceleration is constant. Which one, if either, is correct?

Getting Started

Vectors

Two- and Three-Dimensional Motion

Newtons Laws of Motion

Applications of Newtons Laws of Motion

Gravity

Conservation of Energy

Energy in Nonisolated Systems

Systems of Particles and Conservation of Momentum

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Rotation I: Kinematics and Dynamics

Rotation II: a Conservation Approach

Static Equilibrium, Elasticity, and Fracture

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Oscillations

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Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

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Gausss Law

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Direct Current Dc Circuits

Magnetic Fields and Forces

Gausss Law for Magnetism and Amperes Law

Faradays Law of Induction

Inductors and Ac Circuits

Maxwells Equations and Electromagnetic Waves

Diffraction and Interference

Applications of the Wave Model

Reflection and Images Formed by Reflection

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Relativity

Filters

A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s². At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves?

A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s². For the next 20 s, the acceleration of the particle is −1.0 cm/s². What is the position of the particle at the end of this motion?

A proton moving along the x axis has an initial velocity of 4.0 × 106 m/s and a constant acceleration of 6.0 × 1012 m/s². What is the velocity of the proton after it has traveled a distance of 80 cm?

Starting from rest, a car travels 1350 meters in 1.00 minute. It accelerated at 1.0 m/s² until it reached its cruising speed. Then it drove the remaining distance at constant velocity. What was its cruising speed?