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Ivy |Tech |PHYS | 101 |Summer |Midterm |Study |
Guide |questions |with |answers
If |an |operatic |aria |lasts |for |5.75 |min, |its |length |expressed |in | seconds |is |x |s, |where |x |is less |than |5.75. | greater |than |5.75. |- |CORRECT |ANSWERS |✔✔greater |than |5.75. The |current |definition |of |the |standard |kilogram |of |mass |is |based |on the |mass |of |the |earth. | the |mass |of |the |sun. | the |mass |a |particular |object |kept |in |France. | the |mass |of |a |cesium-133 |atom. |- |CORRECT |ANSWERS |✔✔the |mass | a |particular |object |kept |in |France. When |adding |two |numbers, |the |number |of |significant |figures |in | the |sum |is |equal |to |the |number |of |significant |figures |in |the |least | accurate |of |the |numbers |being |added. True
False |- |CORRECT |ANSWERS |✔✔False The |current |definition |of |the |standard |meter |of |length |is |based |on the |distance |between |the |earth's |equator |and |north |pole. the |distance |between |the |earth |and |the |sun. | the |distance |traveled |by |light |in |a |vacuum. | the |length |of |a |particular |object |kept |in |France. |- |CORRECT | ANSWERS |✔✔the |distance |traveled |by |light |in |a |vacuum. Scientists |use |the |metric |system |chiefly |because |it |is |more |accurate | than |the |English |system. True False |- |CORRECT |ANSWERS |✔✔False Approximately |how |many |times |does |an |average |human |heart |beat | in |a |lifetime? | 3 |× |10^ | 3 |× |10^ | 3 |× |10^
| 4 |× |10^
| 4 |× |10^
| 4 |× |10^
| 4 |× |10^
| 4 |× |10^9 |- |CORRECT |ANSWERS |✔✔ 4 |x |10^ If |a |flower |is |6.5 |cm |wide, |its |width |expressed |in |millimeters |is |x | mm, |where |x |is |less |than |6.5. | |greater |than |6.5. |- |CORRECT |ANSWERS |✔✔greater |than |6.5. If |a |tree |is | 15 |m |tall, |its |height |expressed |in |feet |is |x |ft, |where |x |is |less |than |15. | |greater |than |15. |- |CORRECT |ANSWERS |✔✔Greater |then |15. The |current |definition |of |the |standard |second |of |time |is |based |on |the |frequency |of |radiation |emitted |by |cesium |atoms. |the |earth's |rotation |rate. |the |duration |of |one |year. | |the |oscillation |of |a |particular |pendulum |kept |in |France. |- |CORRECT | ANSWERS |✔✔the |frequency |of |radiation |emitted |by |cesium |atoms.
Estimate |the |number |of |times |the |earth |will |rotate |on |its |axis | during |a |human's |lifetime. | 3 |× |10^ | 3 |× |10^ | 3 |× |10^ | 3 |× |10^ | 3 |x |10^8 |- |CORRECT |ANSWERS |✔✔ 3 |x |10^ Convert |a |speed |of |4.50 |km/h |to |units |of |ft/min. |(1.00 |m |= |3.28 |ft) |0.246 |ft/min | |82.3 |ft/min | | 165 |ft/min | | 246 |ft/min | | 886 |ft/min |- |CORRECT |ANSWERS |✔✔ 246 |ft/min The |exhaust |fan |on |a |typical |kitchen |stove |pulls | 600 |CFM |(cubic |feet |per |minute) |through |the |filter. |Given |that |1.00 |in. |= |2.54 |cm, |how | many |cubic |meters |per |second |does |this |fan |pull? |0.283 |m^3/sec |0.328 |m^3/sec |3.05 |m^3/sec |32.8 |m^3/sec |- |CORRECT |ANSWERS |✔✔0.283 |m^3/sec
|2a |a |a/ |a/4 |- |CORRECT |ANSWERS |✔✔a Two |objects |are |thrown |from |the |top |of |a |tall |building. |One |is | thrown |up, |and |the |other |is |thrown |down, |both |with |the |same | initial |speed. |What |are |their |speeds |when |they |hit |the |street? | Neglect |air |resistance. |The |one |thrown |up |is |traveling |faster. | |The |one |thrown |down |is |traveling |faster. | |They |are |traveling |at |the |same |speed. | |It |is |impossible |to |tell |because |the |height |of |the |building |is |not | given. |- |CORRECT |ANSWERS |✔✔they |are |traveling |at |the |same | speed Suppose |that |a |car |traveling |to |the |west |begins |to |slow |down |as |it | approaches |a |traffic |light. |Which |of |the |following |statements |about | its |acceleration |is |correct? |The |acceleration |is |toward |the |east. | |Since |the |car |is |slowing |down, |its |acceleration |must |be |negative. |The |acceleration |is |zero. | |The |acceleration |is |toward |the |west. |- |CORRECT |ANSWERS |✔✔the | acceleration |is |toward |the |east
An |object |is |thrown |upwards |with |a |speed |of | 16 |m/s. |How |long | does |it |take |it |to |reach |a |height |of |7.0 |m |on |the |way |up? |Neglect | air |resistance. |0.52 |s | |1.2 |s | |2.4 |s | |3.1 |s | |4.2 |s |- |CORRECT |ANSWERS |✔✔.52 |s A |car |is |moving |with |a |constant |acceleration. |At |time |t |= |5.0 |s |its | velocity |is |8.0 |m/s |in |the |forward |direction, |and |at |time |t |= |8.0 |s | its |velocity |is |12.0 |m/s |forward. |What |is |the |distance |traveled |in | that |interval |of |time? | 10 |m | | 20 |m | | 30 |m | | 40 |m | | 50 |m |- |CORRECT |ANSWERS |✔✔30m An |airplane |starts |from |rest |and |accelerates |at |a |constant | 10.8 |m/s2. |What |is |its |speed |at |the |end |of |a | 400 |m-long |runway? |37.0 |m/s |
|Both |its |velocity |and |its |acceleration |points |downward. |- |CORRECT | ANSWERS |✔✔Its |velocity |points |upward |and |its |acceleration |points | downward. An |object |is |moving |with |constant |non-zero |velocity |in |the |+x | direction. |The |position |versus |time |graph |of |this |object |is |a |horizontal |straight |line. | |a |vertical |straight |line. | |a |straight |line |making |an |angle |with |the |time |axis. | |a |parabolic |curve. |- |CORRECT |ANSWERS |✔✔a |horizontal |straight | line. The |slope |of |a |velocity |versus |time |graph |gives |the |distance |traveled. | |velocity. | |acceleration. | |displacement. |- |CORRECT |ANSWERS |✔✔acceleration An |object |moving |in |the |+x |direction |experiences |an |acceleration |of | +2.0 |m/s2. |This |means |the |object |travels |2.0 |m |in |every |second. | |is |traveling |at |2.0 |m/s. | |is |decreasing |its |velocity |by |2.0 |m/s |every |second. |
|is |increasing |its |velocity |by |2.0 |m/s |every |second |- |CORRECT | ANSWERS |✔✔is |increasing |its |velocity |by |2.0 |m/s |every |second Which |of |the |following |quantities |has |units |of |a |displacement? | (There |could |be |more |than |one |correct |choice.) | 32 |ft/s2 |vertically |downward | 40 |km |southwest | |9.8 |m/s |-120 |m/s | |186,000 |mi |- |CORRECT |ANSWERS |✔✔-120 |m/s A |car |is |traveling |with |a |constant |speed |when |the |driver |suddenly | applies |the |brakes, |causing |the |car |to |slow |down |with |a |constant | acceleration |of |magnitude |3.50 |m/s2. |If |the |car |comes |to |a |stop |in | a |distance |of |30.0 |m, |what |was |the |car's |original |speed? |10.2 |m/s | |14.5 |m/s | | 105 |m/s | | 210 |m/s | | 315 |m/s |- |CORRECT |ANSWERS |✔✔14.5 |m/s A |laser |is |thrown |upward |with |a |speed |of | 12 |m/s |on |the |surface |of | planet |X |where |the |acceleration |due |to |gravity |is |1.5 |m/s2 |and |
desiring |to |reach |the |west |bank |directly |west |from |your |starting | point. |You |should |head |your |motorboat |directly |toward |the |west. | |directly |toward |the |north. | |in |a |general |southwesterly |direction. | |in |a |general |northwesterly |direction. |- |CORRECT |ANSWERS |✔✔in |a | general |northwesterly |direction. Mary |and |Debra |stand |on |a |snow-covered |roof. |They |both |throw | snowballs |with |the |same |initial |speed, |but |in |different |directions. | Mary |throws |her |snowball |downward, |at |30° |below |the |horizontal; | Debra |throws |her |snowball |upward, |at |30° |above |the |horizontal. | Which |of |the |following |statements |are |true |about |just |before |the | snowballs |reach |the |ground |below? |(There |could |be |more |than |one | correct |choice.) |Debra's |snowball |will |stay |in |the |air |longer |than |Mary's |snowball. |Mary's |snowball |will |stay |in |the |air |longer |than |Debra's |snowball. |Both |snowballs |will |take |the |same |amount |of |time |to |hit |the | ground. |Debra's |snowball |has |exactly |the |same |acceleration |as |Mary's | snowball. |Mary's |snowball |has |a |greater |downward |acceleration |than | Debra's |snowball. |- |CORRECT |ANSWERS |✔✔Debra's |snowball |will | stay |in |the |air |longer |than |Mary's |snowball.
|Debra's |snowball |has |exactly |the |same |acceleration |as |Mary's | snowball. For |general |projectile |motion |with |no |air |resistance, |the |vertical | component |of |a |projectile's |acceleration |is |always |zero. | |remains |a |non-zero |constant. | |continuously |increases. | |continuously |decreases. | |first |decreases |and |then |increases. |- |CORRECT |ANSWERS | ✔✔remains |a |non-zero |constant Mary |and |Debra |stand |on |a |snow-covered |roof. |They |both |throw | snowballs |with |the |same |initial |speed, |but |in |different |directions. | Mary |throws |her |snowball |downward, |at |30° |below |the |horizontal; | Debra |throws |her |snowball |upward, |at |30° |above |the |horizontal. | Which |of |the |following |statements |are |true |about |just |as |the | snowballs |reach |the |ground |below? |(There |could |be |more |than |one | correct |choice.) |Debra's |snowball |will |have |a |higher |speed |than |Mary's |snowball. |Mary's |snowball |will |have |a |higher |speed |than |Debra's |snowball. |Both |snowballs |will |hit |the |ground |with |the |same |speed. |Both |snowballs |hit |the |ground |at |the |same |time. |
For |general |projectile |motion |with |no |air |resistance, |the |vertical | component |of |a |projectile's |acceleration |is |always |zero. | |remains |a |non-zero |constant. | |continuously |increases. | |continuously |decreases. | |first |decreases |and |then |increases |- |CORRECT |ANSWERS | ✔✔remains |a |non-zero |constant If |three |vectors |add |to |zero, |they |must |all |have |equal |magnitudes. |True | |False |- |CORRECT |ANSWERS |✔✔false In |order |to |get |an |object |moving, |you |must |push |harder |on |it |than | it |pushes |back |on |you. |True | |False |- |CORRECT |ANSWERS |✔✔False You |are |standing |in |a |moving |bus, |facing |forward, |when |you | suddenly |slide |forward |as |the |bus |comes |to |an |immediate |stop. | What |force |caused |you |to |slide |forward? |gravity |
|the |normal |force |due |to |your |contact |with |the |floor |of |the |bus |the |force |due |to |friction |between |you |and |the |floor |of |the |bus |There |is |not |a |force |causing |you |to |slide |forward. |- |CORRECT | ANSWERS |✔✔There |is |not |a |force |causing |you |to |slide |forward. A |75-N |box |rests |on |a |perfectly |smooth |horizontal |surface. |The | minimum |force |need |to |start |the |box |moving |is | 75 |N. | |7.5 |N. | | 750 |N. | |any |horizontal |force |greater |than |zero. |- |CORRECT |ANSWERS | ✔✔any |horizontal |force |greater |than |zero. A |person |is |using |a |rope |to |lower |a |5.0-N |bucket |into |a |well |with |a | constant |speed |of |2.0 |m/s. |What |is |the |magnitude |of |the |force | exerted |by |the |rope |on |the |bucket? |0.00 |N | |2.0 |N | |5.0 |N | | 10 |N | | 49 |N |- |CORRECT |ANSWERS |✔✔5N
An |object |that |weighs | 75 |N |is |pulled |on |a |horizontal |surface |by |a | horizontal |pull |of | 50 |N |to |the |right. |The |friction |force |on |this | object |is | 30 |N |to |the |left. |What |is |the |acceleration |of |the |object? |0.27 |m/s |1.1 |m/s |2.6 |m/s | 11 |m/s2 |- |CORRECT |ANSWERS |✔✔2.6 |m/s^ An |object |is |moving |with |constant |non-zero |velocity. |Which |of |the | following |statements |about |it |must |be |true? |A |constant |force |is |being |applied |to |it |in |the |direction |of |motion. |A |constant |force |is |being |applied |to |it |in |the |direction |opposite |of | motion. |A |constant |force |is |being |applied |to |it |perpendicular |to |the | direction |of |motion. |The |net |force |on |the |object |is |zero. | |Its |acceleration |is |in |the |same |direction |as |it |velocity. |- |CORRECT | ANSWERS |✔✔The |net |force |on |an |object |is |zero. Two |objects |have |masses |m |and |5m, |respectively. |They |both |are | placed |side |by |side |on |a |frictionless |inclined |ramp |and |allowed |to | slide |down |from |rest |without |any |air |resistance. |Which |one |of |the | following |statements |about |these |objects |is |correct?
|It |takes |the |lighter |object | 5 |times |longer |to |reach |the |bottom |of | the |ramp |than |the |heavier. |It |takes |the |lighter |object | 10 |times |longer |to |reach |the |bottom |of | the |ramp |than |the |heavier. |It |takes |the |heavier |object | 5 |times |longer |to |reach |the |bottom |of | the |ramp |than |the |lighter. |It |takes |the |heavier |object | 10 |times |longer |to |reach |the |bottom |of | the |ramp |than |the |lighter. |The |two |objects |reach |the |bottom |of |the |ramp |at |exactly |the | same |time. |- |CORRECT |ANSWERS |✔✔The |two |objects |reach |the | bottom |of |the |ramp |at |exactly |the |same |time. A |small |car |and |a |large |SUV |are |at |a |stoplight. |The |car |has |a |mass | equal |to |half |that |of |the |SUV, |and |the |SUV |can |produce |a |maximum |accelerating |force |equal |to |twice |that |of |the |car. |When |the |light | turns |green, |both |drivers |push |their |accelerators |to |the |floor |at | the |same |time. |Which |vehicle |pulls |ahead |of |the |other |vehicle |after | a |few |seconds? |The |car |pulls |ahead. | |The |SUV |pulls |ahead. | |It |is |a |tie. |- |CORRECT |ANSWERS |✔✔its |a |tie. You |pull |on |a |crate |with |a |rope. |If |the |crate |moves, |the |rope's |pull | on |the |crate |must |have |been |larger |than |the |crate's |pull |on |the |
