AP Physics 1 exam questions complete
solutions
Object |weight |W |planet |Radius |R |moved |distance |4R |- |CORRECT |ANSWER✔✔-1/16W
Box |moved |with |force |F |same |box |with |force |F/2 |what's |true? |- |CORRECT |ANSWER✔✔-Force |
of |static |friction |= |F/2
A |projectile |launched |from |level |ground |initial |velocity |v0 |and |angle |theta |what's |total |time |in |
air |- |CORRECT |ANSWER✔✔-2v0sintheta/g
Balls |1 |and |2 |are |each |thrown |horizontally |from |the |same |height |above |level |ground, |but |ball |
2 |has |a |greater |initial |velocity |how |do |the |accelerations |of |the |balls |and |the |times |it |takes |
them |to |hit |the |ground |compare? |- |CORRECT |ANSWER✔✔-the |same
A |heavy, |uniform |rope |hangs |from |a |ceiling. |Which |of |the |following |best |compares |the |
magnitude |of |the |tension |force |in |the |middle |of |the |rope, |fmid |, |to |the |magnitude |of |the |
tension |at |the |top |of |the |rope, |ftop |? |- |CORRECT |ANSWER✔✔-fmid-ftop/2
A |rowboat |moving |in |a |lake |is |accelerating |at |a |constant |rate |towards |the |shore. |An |observer |
in |another |boat |moving |at |a |constant |velocity |measures |the |row |boat's |acceleration. |A |second
|observer, |standing |still |on |the |shore, |also |measures |the |acceleration |of |the |rowboat. |Are |the |
two |accelerations |measured |by |the |two |observers |the |same? |Why |or |why |not? |- |CORRECT |
ANSWER✔✔-yes |inertial |frames |of |reference
A |force |is |exerted |on |a |block |as |the |block |slides |across |a |horizontal |surface. |The |graph |shows |
the |magnitude |of |the |force |as |a |function |of |the |block's |position. |The |total |amount |of |work |
,done |on |the |block |by |the |force |during |the |interval |shown |in |the |graph |is |most |nearly |- |
CORRECT |ANSWER✔✔-11J
A |block |of |mass |m |is |hanging |in |equilibrium |from |a |spring. |The |block |stretches |the |spring |to |
length |L, |as |shown |in |Figure |1. |The |block |is |removed, |and |the |spring |returns |to |its |unstretched
|length |of |3L/4. |If |a |larger |block |with |mass |4m |is |hung |from |the |spring |and |slowly |lowered |
until |it |is |in |equilibrium, |what |will |the |new |length |of |the |spring |be? |- |CORRECT |ANSWER✔✔-
7L/4
At |time |t1, |the |center |of |a |moon |of |mass |m |is |a |distance |d |from |the |center |of |a |planet |of |
mass |M. |Later, |at |time |t2, |the |center |of |the |moon |is |a |distance |2d |from |the |center |of |the |
planet. |The |gravitational |potential |energy |of |the |moon-planet |system |at |time |t1 |is |Ut1, |and |
the |gravitational |potential |of |the |system |at |time |t2 |is |Ut2. |Which |of |the |following |indicates |
the |ratio |of |the |gravitational |potential |energy |of |the |moon-planet |system |Ut1/Ut2? |- |CORRECT
|ANSWER✔✔-2
The |graphs |represent |the |speed |of |a |ball |thrown |downward |as |a |function |of |time |near |the |
surface |of |two |planets. |Which |of |the |following |correctly |relates |the |acceleration |a1 |of |the |ball |
near |the |surface |of |Planet |1 |and |the |acceleration |of |the |ball |a2 |near |the |surface |of |Planet |2? |-
|CORRECT |ANSWER✔✔-a1>a2>0
diagram |2 |spring |carts |with |darts |- |CORRECT |ANSWER✔✔-(D/t2)-(D/t1)
At |time |t1, |a |train |on |a |horizontal |track |has |speed |v |and |acceleration |a. |A |short |time |later, |
time |t2, |the |train |has |speed |2v |and |acceleration |a. |How |does |the |instantaneous |power |P1 |
delivered |to |the |train |at |time |t1 |compare |to |the |instantaneous |power |P2 |delivered |to |the |
train |at |time |t2? |- |CORRECT |ANSWER✔✔-P1<P2
Planets |A |and |B |move |in |circular |orbits |at |different |distances |from |a |star |of |mass |M. |Planet |A |
has |mass |m0 |and |orbital |radius |r0. |The |gravitational |potential |energy |of |the |Planet |A-star |
system |is |UA. |Planet |B |has |mass |4m0 |and |orbital |radius |2r0. |The |gravitational |potential |energy
|of |the |Planet |B-star |system |is |UB. |What |is |the |ratio |UA:UB? |- |CORRECT |ANSWER✔✔-1 |: |2
, A |spring-loaded |toy |is |launched |straight |upward |from |the |surface |of |a |table. |In |Case |1, |the |toy
|is |caught |at |the |instant |that |it |reaches |its |highest |point |and |held |at |rest. |In |Case |2, |the |toy |is |
allowed |to |rise, |then |fall |back |to |the |table. |In |which |case |is |the |magnitude |of |the |average |
velocity |of |the |toy's |free-fall |motion |the |greatest? |- |CORRECT |ANSWER✔✔-Case |1 |
displacement
Two |objects, |X |and |Y, |accelerate |from |rest |with |the |same |constant |acceleration. |Object |X |
accelerates |for |twice |the |time |as |object |Y. |Which |of |the |following |is |true |of |these |objects |at |
the |end |of |their |respective |periods |of |acceleration? |- |CORRECT |ANSWER✔✔-Object |X |4 |times |
as |far
A |hypothetical |spherical |planet |of |mass |M |and |radius |R |is |made |of |a |uniform |substance |and |
has |a |gravitational |field |g |at |its |surface. |Suppose |eight |of |these |identical |planets |collide |and |
combine |into |a |new |uniform, |spherical |planet. |What |will |the |gravitational |field |on |the |surface |
of |this |new |planet |be |in |terms |of |g? |- |CORRECT |ANSWER✔✔-2g
A |satellite |orbits |Earth |in |a |circle |of |radius |r |with |speed |v. |The |satellite |is |then |moved |into |a |
new |circular |orbit |with |radius |3r. |What |tangential |speed |must |the |satellite |have |in |order |to |
maintain |the |new |orbit? |- |CORRECT |ANSWER✔✔-v/sqrt3
carts |A30 |B-50 |C40 |- |CORRECT |ANSWER✔✔-C>B>A
diagram |circle |steel |ball |- |CORRECT |ANSWER✔✔-ball |goes |to |the |center
An |object |of |mass |m |travels |in |a |horizontal |circular |path |of |radius |r |at |constant |speed. |The |
object's |period |of |revolution |is |T. |What |is |the |centripetal |acceleration |of |the |object? |- |
CORRECT |ANSWER✔✔-(4pi^2r)/T^2
t1 |t2 |boxes |diagram |- |CORRECT |ANSWER✔✔-C
solutions
Object |weight |W |planet |Radius |R |moved |distance |4R |- |CORRECT |ANSWER✔✔-1/16W
Box |moved |with |force |F |same |box |with |force |F/2 |what's |true? |- |CORRECT |ANSWER✔✔-Force |
of |static |friction |= |F/2
A |projectile |launched |from |level |ground |initial |velocity |v0 |and |angle |theta |what's |total |time |in |
air |- |CORRECT |ANSWER✔✔-2v0sintheta/g
Balls |1 |and |2 |are |each |thrown |horizontally |from |the |same |height |above |level |ground, |but |ball |
2 |has |a |greater |initial |velocity |how |do |the |accelerations |of |the |balls |and |the |times |it |takes |
them |to |hit |the |ground |compare? |- |CORRECT |ANSWER✔✔-the |same
A |heavy, |uniform |rope |hangs |from |a |ceiling. |Which |of |the |following |best |compares |the |
magnitude |of |the |tension |force |in |the |middle |of |the |rope, |fmid |, |to |the |magnitude |of |the |
tension |at |the |top |of |the |rope, |ftop |? |- |CORRECT |ANSWER✔✔-fmid-ftop/2
A |rowboat |moving |in |a |lake |is |accelerating |at |a |constant |rate |towards |the |shore. |An |observer |
in |another |boat |moving |at |a |constant |velocity |measures |the |row |boat's |acceleration. |A |second
|observer, |standing |still |on |the |shore, |also |measures |the |acceleration |of |the |rowboat. |Are |the |
two |accelerations |measured |by |the |two |observers |the |same? |Why |or |why |not? |- |CORRECT |
ANSWER✔✔-yes |inertial |frames |of |reference
A |force |is |exerted |on |a |block |as |the |block |slides |across |a |horizontal |surface. |The |graph |shows |
the |magnitude |of |the |force |as |a |function |of |the |block's |position. |The |total |amount |of |work |
,done |on |the |block |by |the |force |during |the |interval |shown |in |the |graph |is |most |nearly |- |
CORRECT |ANSWER✔✔-11J
A |block |of |mass |m |is |hanging |in |equilibrium |from |a |spring. |The |block |stretches |the |spring |to |
length |L, |as |shown |in |Figure |1. |The |block |is |removed, |and |the |spring |returns |to |its |unstretched
|length |of |3L/4. |If |a |larger |block |with |mass |4m |is |hung |from |the |spring |and |slowly |lowered |
until |it |is |in |equilibrium, |what |will |the |new |length |of |the |spring |be? |- |CORRECT |ANSWER✔✔-
7L/4
At |time |t1, |the |center |of |a |moon |of |mass |m |is |a |distance |d |from |the |center |of |a |planet |of |
mass |M. |Later, |at |time |t2, |the |center |of |the |moon |is |a |distance |2d |from |the |center |of |the |
planet. |The |gravitational |potential |energy |of |the |moon-planet |system |at |time |t1 |is |Ut1, |and |
the |gravitational |potential |of |the |system |at |time |t2 |is |Ut2. |Which |of |the |following |indicates |
the |ratio |of |the |gravitational |potential |energy |of |the |moon-planet |system |Ut1/Ut2? |- |CORRECT
|ANSWER✔✔-2
The |graphs |represent |the |speed |of |a |ball |thrown |downward |as |a |function |of |time |near |the |
surface |of |two |planets. |Which |of |the |following |correctly |relates |the |acceleration |a1 |of |the |ball |
near |the |surface |of |Planet |1 |and |the |acceleration |of |the |ball |a2 |near |the |surface |of |Planet |2? |-
|CORRECT |ANSWER✔✔-a1>a2>0
diagram |2 |spring |carts |with |darts |- |CORRECT |ANSWER✔✔-(D/t2)-(D/t1)
At |time |t1, |a |train |on |a |horizontal |track |has |speed |v |and |acceleration |a. |A |short |time |later, |
time |t2, |the |train |has |speed |2v |and |acceleration |a. |How |does |the |instantaneous |power |P1 |
delivered |to |the |train |at |time |t1 |compare |to |the |instantaneous |power |P2 |delivered |to |the |
train |at |time |t2? |- |CORRECT |ANSWER✔✔-P1<P2
Planets |A |and |B |move |in |circular |orbits |at |different |distances |from |a |star |of |mass |M. |Planet |A |
has |mass |m0 |and |orbital |radius |r0. |The |gravitational |potential |energy |of |the |Planet |A-star |
system |is |UA. |Planet |B |has |mass |4m0 |and |orbital |radius |2r0. |The |gravitational |potential |energy
|of |the |Planet |B-star |system |is |UB. |What |is |the |ratio |UA:UB? |- |CORRECT |ANSWER✔✔-1 |: |2
, A |spring-loaded |toy |is |launched |straight |upward |from |the |surface |of |a |table. |In |Case |1, |the |toy
|is |caught |at |the |instant |that |it |reaches |its |highest |point |and |held |at |rest. |In |Case |2, |the |toy |is |
allowed |to |rise, |then |fall |back |to |the |table. |In |which |case |is |the |magnitude |of |the |average |
velocity |of |the |toy's |free-fall |motion |the |greatest? |- |CORRECT |ANSWER✔✔-Case |1 |
displacement
Two |objects, |X |and |Y, |accelerate |from |rest |with |the |same |constant |acceleration. |Object |X |
accelerates |for |twice |the |time |as |object |Y. |Which |of |the |following |is |true |of |these |objects |at |
the |end |of |their |respective |periods |of |acceleration? |- |CORRECT |ANSWER✔✔-Object |X |4 |times |
as |far
A |hypothetical |spherical |planet |of |mass |M |and |radius |R |is |made |of |a |uniform |substance |and |
has |a |gravitational |field |g |at |its |surface. |Suppose |eight |of |these |identical |planets |collide |and |
combine |into |a |new |uniform, |spherical |planet. |What |will |the |gravitational |field |on |the |surface |
of |this |new |planet |be |in |terms |of |g? |- |CORRECT |ANSWER✔✔-2g
A |satellite |orbits |Earth |in |a |circle |of |radius |r |with |speed |v. |The |satellite |is |then |moved |into |a |
new |circular |orbit |with |radius |3r. |What |tangential |speed |must |the |satellite |have |in |order |to |
maintain |the |new |orbit? |- |CORRECT |ANSWER✔✔-v/sqrt3
carts |A30 |B-50 |C40 |- |CORRECT |ANSWER✔✔-C>B>A
diagram |circle |steel |ball |- |CORRECT |ANSWER✔✔-ball |goes |to |the |center
An |object |of |mass |m |travels |in |a |horizontal |circular |path |of |radius |r |at |constant |speed. |The |
object's |period |of |revolution |is |T. |What |is |the |centripetal |acceleration |of |the |object? |- |
CORRECT |ANSWER✔✔-(4pi^2r)/T^2
t1 |t2 |boxes |diagram |- |CORRECT |ANSWER✔✔-C
