Hanzo Conard
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Hanzo Conard
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Physics Theory #2

Frage 1 von 40

1

The average speed of a moving object during a given interval of time is always:

Wähle eine der folgenden:

  • The magnitude of its average velocity over the interval

  • The distance covered during the time interval divided by the time interval

  • One-half its speed at the end of the interval

  • One-half its acceleration multiplied by the time interval

Erklärung

Frage 2 von 40

1

Of the following situations, which one is impossible

Wähle eine der folgenden:

  • A body having velocity east and acceleration east

  • A body having velocity east and acceleration west

  • A body having zero velocity and non-zero acceleration

  • A body having constant acceleration and variable velocity

  • A body having constant velocity and variable acceleration

Erklärung

Frage 3 von 40

1

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

Wähle eine der folgenden:

  • Positive and negative, respectively

  • Negative and positive, respectively

  • Negative and negative, respectively

  • Negative and zero, respectively

  • Positive and zero, respectively

Erklärung

Frage 4 von 40

1

A particle moves on the x axis.When its acceleration is positive and increasing:

Wähle eine der folgenden:

  • Its velocity must be positive

  • Its velocity must be negative

  • It must be slowing down

  • It must be speeding up

  • None of the above must be true

Erklärung

Frage 5 von 40

1

A particle moves along the x axis according to the equation x = 6t^2, where x is in meters and t is in seconds.Therefore

Wähle eine der folgenden:

  • The acceleration of the particle is 6 m/s2

  • t cannot be negative

  • The particle follows a parabolic path

  • Each second the velocity of the particle changes by 9.8 m/s

  • None of the above

Erklärung

Frage 6 von 40

1

A ball is in free fall.Its acceleration is:

Wähle eine der folgenden:

  • Downward during both ascent and descent

  • Downward during ascent and upward during descent

  • Upward during ascent and downward during descent

  • Upward during both ascent and descent

  • Downward at all times except at the very top, when it is zero

Erklärung

Frage 7 von 40

1

A ball is in free fall. Upward is taken to be the positive direction. The displacement of the ball during a short time interval is

Wähle eine der folgenden:

  • Positive during both ascent and descent

  • Negative during both ascent and descent

  • Negative during ascent and positive during descent

  • Positive during ascent and negative during descent

  • None of the above

Erklärung

Frage 8 von 40

1

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

Wähle eine der folgenden:

  • Zero

  • g,down

  • g,up

  • 2g,down

  • 2g,up

Erklärung

Frage 9 von 40

1

Which one of the following statements is correct for an object released from rest

Wähle eine der folgenden:

  • The average velocity during the first second of time is 4.9m/s

  • During each second the object falls 9.8m

  • The acceleration changes by 9.8m/s2 every second

  • The object falls 9.8m during the first second of time

  • The acceleration of the object is proportional to its weight

Erklärung

Frage 10 von 40

1

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

Wähle eine der folgenden:

  • The body falls 9.8 m during each second

  • The body falls 9.8 m during the first second only

  • The speed of the body increases by 9.8 m/s during each second

  • The acceleration of the body increases by 9.8 m/s2 during each second

  • The acceleration of the body decreases by 9.8 m/s2 during each second

Erklärung

Frage 11 von 40

1

An object is shot vertically upward. While it is rising

Wähle eine der folgenden:

  • Its velocity and acceleration are both upward

  • Its velocity is upward and its acceleration is downward

  • Its velocity and acceleration are both downward

  • Its velocity is downward and its acceleration is upward

  • Its velocity and acceleration are both decreasing

Erklärung

Frage 12 von 40

1

A feather, initially at rest, is released in a vacuum 12 m above the surface of the earth.Which of the following statements is correct

Wähle eine der folgenden:

  • The maximum velocity of the feather is 9.8 m/s

  • The acceleration of the feather decreases until terminal velocity is reached

  • The acceleration of the feather remains constant during the fall

  • The acceleration of the feather increases during the fall

  • The acceleration of the feather is zero

Erklärung

Frage 13 von 40

1

The area under a velocity-time graph represents

Wähle eine der folgenden:

  • Acceleration

  • Change in acceleration

  • Speed

  • Change in velocity

  • Displacement

Erklärung

Frage 14 von 40

1

Displacement can be obtained from

Wähle eine der folgenden:

  • The slope of an acceleration-time graph

  • The slope of a velocity-time graph

  • The area under an acceleration-time graph

  • The area under a velocity-time graph

Erklärung

Frage 15 von 40

1

An object has a constant acceleration of 3 m/s2. The coordinate versus time graph for this object has a slope

Wähle eine der folgenden:

  • That increases with time

  • That is constant

  • That decreases with time

  • Of 3 m/s

  • Of 3 m/s^2

Erklärung

Frage 16 von 40

1

Velocity is defined as

Wähle eine der folgenden:

  • Rate of change of position with time

  • Position divided by time

  • Rate of change of acceleration with time

  • A speeding up or slowing down

  • Change of position

Erklärung

Frage 17 von 40

1

Acceleration is defined as:

Wähle eine der folgenden:

  • Rate of change of position with time

  • Speed divided by time

  • Rate of change of velocity with time

  • A speeding up or slowing down

  • Change of velocity

Erklärung

Frage 18 von 40

1

Which of the following is a scalar quantity?

Wähle eine der folgenden:

  • Speed

  • Velocity

  • Displacement

  • Acceleration

  • None of these

Erklärung

Frage 19 von 40

1

Which of the following is a vector quantity?

Wähle eine der folgenden:

  • Mass

  • Density

  • Speed

  • Temperature

  • None of these

Erklärung

Frage 20 von 40

1

Which of the following is NOT an example of accelerated motion?

Wähle eine der folgenden:

  • Vertical component of projectile motion

  • Circular motion at constant speed

  • A swinging pendulum

  • Earth’s motion about sun

  • Horizontal component of projectile motion

Erklärung

Frage 21 von 40

1

Two bodies are falling with negligible air resistance, side by side, above a horizontal plane.If one of the bodies is given an additional horizontal acceleration during its descent, it:

Wähle eine der folgenden:

  • Strikes the plane at the same time as the other body

  • Strikes the plane earlier than the other body

  • Has the vertical component of its velocity altered

  • Has the vertical component of its acceleration altered

  • Follows a straight line path along the resultant acceleration vector

Erklärung

Frage 22 von 40

1

The velocity of a projectile equals its initial velocity added to:

Wähle eine der folgenden:

  • A constant horizontal velocity

  • A constant vertical velocity

  • A constantly increasing horizontal velocity

  • A constantly increasing downward velocity

  • A constant velocity directed at the target

Erklärung

Frage 23 von 40

1

A stone thrown from the top of a tall building follows a path that is:

Wähle eine der folgenden:

  • Circular

  • Made of two straight line segments

  • Hyperbolic

  • Parabolic

  • A straight line

Erklärung

Frage 24 von 40

1

Identical guns fire identical bullets horizontally at the same speed from the same height above level planes, one on the Earth and one on the Moon. Which of the following three statements is/are true?
I. The horizontal distance traveled by the bullet is greater for the Moon
II. The flight time is less for the bullet on the Earth
III. The velocity of the bullets at impact are the same.

Wähle eine oder mehr der folgenden:

  • I

  • II

  • III

Erklärung

Frage 25 von 40

1

A bomber flying in level flight with constant velocity releases a bomb before it is over the target. Neglecting air resistance, which one of the following is NOT true:

Wähle eine der folgenden:

  • The bomber is over the target when the bomb strikes

  • The acceleration of the bomb is constant

  • The horizontal velocity of the plane equals the vertical velocity of the bomb when it hits the target

  • The bomb travels in a curved path

  • The time of flight of the bomb is independent of the horizontal speed of the plane

Erklärung

Frage 26 von 40

1

An object is shot from the back of a railroad flatcar moving at 40km/h on a straight horizontal road. The launcher is aimed upward, perpendicular to the bed of the flatcar. The object falls:

Wähle eine der folgenden:

  • In front of the flatcar

  • Behind the flatcar

  • On the flatcar

  • Either behind or in front of the flatcar, depending on the initial speed of the object

  • To the side of the flatcar

Erklärung

Frage 27 von 40

1

An isothermal process for an ideal gas is represented on a p-V diagram by:

Wähle eine der folgenden:

  • A horizontal line

  • A vertical line

  • A portion of an ellipse

  • A portion of a parabola

  • A portion of a hyperbola

Erklärung

Frage 28 von 40

1

Which of the following types of electromagnetic radiation travels at the greatest speed in vacuum?

Wähle eine der folgenden:

  • Radio waves

  • Visible light

  • X rays

  • Gamma rays

  • All of these travel at the same speed

Erklärung

Frage 29 von 40

1

An electromagnetic wave is generated by:

Wähle eine der folgenden:

  • Any moving charge

  • Any accelerating charge

  • Only a charge with changing acceleration

  • Only a charge moving in a circle

  • Only a charge moving in a straight line

Erklärung

Frage 30 von 40

1

In a plane electromagnetic wave in vacuum, the ratio E/B of the amplitudes in SI units of the two fields is:

Wähle eine der folgenden:

  • The speed of light

  • An increasing function of frequency

  • A decreasing function of frequency

  • √2

  • 1/√2

Erklärung

Frage 31 von 40

1

The relation θ(incident) = θ(reflected),whichapplies as a ray of light strikes an interface between two media, is known as:

Wähle eine der folgenden:

  • Faraday’s law

  • Snell’s law

  • Ampere’s law

  • Cole’s law

  • None of these

Erklärung

Frage 32 von 40

1

As used in the laws of reflection and refraction, the “normal” direction is:

Wähle eine der folgenden:

  • Any convenient direction

  • Tangent to the interface

  • Along the incident ray

  • Perpendicular to the electric field vector of the light

  • Perpendicular to the interface

Erklärung

Frage 33 von 40

1

When an electromagnetic wave meets a reflecting surface, the direction taken by the reflected wave is determined by:

Wähle eine der folgenden:

  • The material of the reflecting surface

  • The angle of incidence

  • The index of the medium

  • The intensity of the wave

  • The wavelength

Erklärung

Frage 34 von 40

1

The index of refraction of a substance is:

Wähle eine der folgenden:

  • The speed of light in the substance

  • The angle of refraction

  • The angle of incidence

  • The speed of light in vacuum divided by the speed of light in the substance

  • Measured in radians

Erklärung

Frage 35 von 40

1

The units of index of refraction are:

Wähle eine der folgenden:

  • m/s

  • s/m

  • radian

  • m/s^2

  • None of these

Erklärung

Frage 36 von 40

1

A virtual image is one:

Wähle eine der folgenden:

  • Toward which light rays converge but do not pass through

  • From which light rays diverge but do not pass through

  • From which light rays diverge as they pass through

  • Toward which light rays converge and pass through

  • With a ray normal to a mirror passing through it

Erklärung

Frage 37 von 40

1

When you stand in front of a plane mirror, your image is:

Wähle eine der folgenden:

  • Real, erect, and smaller than you

  • Real, erect, and the same size as you

  • Virtual, erect, and smaller than you

  • Virtual, erect, and the same size as you

  • Real, inverted, and the same size as you

Erklärung

Frage 38 von 40

1

As an object is moved from the center of curvature of a concave mirror toward its focal point its image:

Wähle eine der folgenden:

  • Remains virtual and becomes larger

  • Remains virtual and becomes smaller

  • Remains real and becomes larger

  • Remains real and becomes smaller

  • Remains real and approaches the same size as the object

Erklärung

Frage 39 von 40

1

The image of an erect candle, formed using a convex mirror, is always:

Wähle eine der folgenden:

  • Virtual, inverted, and smaller than the candle

  • Virtual, inverted, and larger than the candle

  • Virtual, erect, and larger than the candle

  • Virtual, erect, and smaller than the candle

  • Real, erect, and smaller than the candle

Erklärung

Frage 40 von 40

1

At what distance in front of a concave mirror must an object be placed so that the image and object are the same size:

Wähle eine der folgenden:

  • A focal length

  • Half a focal length

  • Twice a focal length

  • Less than half focal length

  • More than twice a focal length

Erklärung