Physics 111 Test 1 Questions And Answers 100% Guaranteed Success.

Physics 111 Test 1 Questions And Answers 100% Guaranteed Success. Which .is .not .a .fundamental .dimension .for .mechanics? . A. .mass. B. .time. C. .length. D. .velocity .- .correct .answer. . . . .D A .millimeter .(mm) .is A. .103 .m. . B. .10 .m. C. .10−3 .m. .D. .10−4 .m .- .correct .answer. . . . .C In .the .expression .F .= .ma, .where .[F] .= .[M] .∗ .[L]/[T2] .and .[m] .= .[M], .the .dimensions .of .a .are A. .[L]/[T]. . B. .1/[T]. C. .[T2]/[L]. . D. .[L]/[T2]. .- .correct .answer. . . . .D Which .result .for .(2.1 .m)(3.43 .m)+2.442 .m2 .has .the .correct .number .of .significant .figures? A. .9.648 .m2. . B. .9.64 .m2. C. .9.6 .m2. . D. .9 .m2 .- .correct .answer. . . . .C... The .distance .to .the .Sun .from .the .Earth .is .93 .million .miles. .What .is .the .distance .in .SI .units? .- .correct .answer. . . . . A .circular .cylinder .of .height .and .diameter .39.17 .mm .has .a .mass .of .1 .kilogram. .What .is .its .density .(mass .per .unit .volume)? .- .correct .answer. . . . . Which .of .the .following .is .not .needed .to .specify .a .coordinate .axis .in .a .graph? A. .origin. B. .direction .arrow. C. .scale. D. .lunar .phase. .- .correct .answer. . . . .D The .sign .of .a .displacement .has .no .meaning. T. .true. F. .false. .- .correct .answer. . . . .False The .SI .unit .m/s2 .corresponds .to . A. .velocity. B. .acceleration. C. .force. D. .angular .momentum. .- .correct .answer. . . . .B The .(instantaneous) .acceleration .is .obtained .as .the .slope .of .the .line .tangent .to .the .A. .position .vs .time .curve. B. .acceleration .vs .time .curve. C. .velocity .vs .position .curve. . D. .velocity .vs .time .curve. .- .correct .answer. . . . .D The .sign .of .the .speed .has .meaning. . T. .true. F. .false. .- .correct .answer. . . . .False The .acceleration .during .free .fall .is .always .positive. . T. .true. F. .false. .- .correct .answer. . . . .False The .formula .vf2 .= .vi2 .+ .2a(xf .− .xi) .is .useful .when A. .the .time .interval .is .needed. . B. .the .displacement .is .given. C. .the .acceleration .is .not .constant. . D. .none .of .these. .- .correct .answer. . . . .B Under .constant .acceleration, .x(t) .is .parabolic. .If .the .parabola .opens .in .the .direction .of .positive .x, A. .the .velocity .is .positive. . B. .the .velocity .is .negative. C. .the .acceleration .is .positive. . D. .the .acceleration .is .negative. .- .correct .answer. . . . .C... Which .of .the .following .is .independent .of .the .choice .of .coordinates? .(Pick .all .that .apply.) A. .vector .components. . B. .vector .angle. C. .vector .magnitude. . D. .vector .direction. .- .correct .answer. . . . .C .& .D Which .of .the .following .is .independent .of .where .a .vector .is .placed? .(Pick .all .that .apply.) A. .the .vector's .components. . B. .the .vector's .angle. C. .the .vector's .magnitude. . D. .the .vector's .direction. .- .correct .answer. . . . .All .above... Writing .A .to .represent .a .vector .is .just .as .good .as .writing .A⃗. .T. .true. F. .false. .- .correct .answer. . . . .False... A .unit .vector .is .a .vector .that .carries .dimensions, .a.k.a. .units T. .true. .F. .false. .- .correct .answer. . . . .True For .the .vector .A⃗ .= .αxˆ .+ .βyˆ, .the .direction .relative .to .the .x .axis .is .given .by .the .angle A. .tan−1(α/β). . B. .tan−1(β/α). C. .sin−1(β/α). . D. .cos−1(β/α). .- .correct .answer. . . . .B Which .of .the .following .does .not .hold .for .constant .acceleration? A. .constant .magnitude .and .direction. . B. .constant .components. C. .x .and .y .motions .are .independent. D. .both .velocity .components .change .at .the .same .rate. .- .correct .answer. . . . .D Two .objects .are .falling .to .the .surface .of .the .moon .from .the .same .short .height. .Object .A .is .falling .straight .down .from .rest; .object .B .was .given .a .horizontal .velocity .component. A. .Object .A .hits .the .cheese .first. B. .Object .B .hits .the .cheese .first. C. .The .objects .hit .the .cheese .at .the .same .time. D. .We .cannot .predict. .Physics .as .we .know .it .works .only .on .Earth. .- .correct .answer. . . . .C For .an .object .undergoing .constant .acceleration, .starting .from .rest, .the .ratio .of .velocity .components .will .always .be .the .same .as .the .ratio .of .acceleration .components. True/False .- .correct .answer. . . . .True The .peak .of .the .motion .for .a .projectile .happens .when A. .the .horizontal .velocity .component .becomes .zero. B. .the .horizontal .acceleration .component .becomes .zero. .C. .the .vertical .velocity .component .becomes .zero. D. .the .vertical .acceleration .component .becomes .zero. .- .correct .answer. . . . ....C The .range .of .a .projectile .increases .with .launch .angle. . A. .always. B. .only .for .angles .above .45◦. C. .only .for .angles .below .45◦. D. .none .of .the .above. .- .correct .answer. . . . ....c The .shape .of .a .projectile's .trajectory .is . A. .a .hyperbola. B. .an .ellipse. C. .a .parabola. D. .way .too .complicated .to .have .a .simple .name. .- .correct .answer. . . . ....C Velocity .is .the .same .in .any .frame. . T. .true. F. .false. .- .correct .answer. . . . ....False If ⃗v .′ .is .the .velocity .of .an .object .in .a .moving .frame .and .V⃗ .is .the .velocity .of .that .frame .relative .to .one .at .rest, .then .the .velocity .of .the .object .as .observed .in .the .frame .at .rest .is A .. ⃗v .= ⃗v .′ .+ .V⃗ .. . B .. ⃗v .= ⃗v .′ .− .V⃗ .. C .. ⃗v .= ⃗v .′ .. . D .. ⃗v .= .V⃗ .. .- .correct .answer. . . . ....A Given .that .velocities .in .two .different .frames .are .related .by ⃗v .= ⃗v .′ .+ .V⃗ ., .with .V⃗ .the .relative .velocity .of .the .frames, .how would .the .corresponding .accelerations, ⃗a, ⃗a .′, .and .A⃗, .be .related? A .. ⃗a .= ⃗a .′ .+ .A⃗ .. . B .. ⃗a .= ⃗a .′ .− .A⃗ .. C .. ⃗a .= ⃗a .′ .. . D .. ⃗a .= .A⃗ .. .- .correct .answer. . . . ....A Which .of .the .following .is .not .true .of .a .net .force? A. .Defined .by .a .vector .and .a .line .of .action. B. .Can .depend .on .position, .velocity, .or .time. C. .Accelerates .the .object .on .which .it .acts. D. .Has .magnitude .which .is .the .sum .of .individual .force .magnitudes. .- .correct .answer. . . . .D Newton's .first .law .is .a .means .to .detect .non-inertial .frames. .T. .true. F. .false. .- .correct .answer. . . . .True Which .of .the .following .is .not .true .of .Newton's .second .law? .A. .The .law .acts .as .a .force .detector/modeler. B. .The .law .predicts .the .acceleration. C. .Any .individual .forces .are .combined .as .vectors. D. .The .lines .of .action .of .the .forces .do .not .matter. .- .correct .answer. . . . .D A .free-body .diagram .should .not .include .A. .the .relevant .angles. B. .coordinate .axes. C. .forces .exerted .by .the .object.