RIO SOLADO - PHY 111 MIDTERM 1
A-student-moves-8.0-m-to-the-west,-6.0-m-to-the-north,-and-10.0-m-to-the-east.-What-is-the-
magnitude-of-the-displacement?---ans-✔✔6.3-m
Examine-the-position-vs.-time-graph-below.-What-is-the-velocity-of-the-object-at-t-=-5.0-s?---
ans-✔✔-5-m/s
A-student-measures-the-mass-of-an-object-at-4.68-g-and-the-volume-of-the-object-at-2.3-
mL.-The-student-calculates-the-density-as-2.03478-g/mL.-A-second-student-disagrees-
with-the-density.-Which-of-the-following-statements-would-explain-why-the-second-student-
disagrees?---ans-✔✔The-number-of-decimals-in-the-answer-does-not-show-proper-
precision.
Examine-the-position-vs.-time-graph-below.-Which-of-the-following-correctly-describes-the-
motion-of-the-object?---ans-✔✔Forwards-at-a-constant-speed-and-then-backward-at-a-
constant-speed
A-car-moving-at-a-constant-25-m/s-travels-for-3.0-seconds.-What-is-the-distance-traveled-
by-the-car?---ans-✔✔75-m
A-student-measures-the-mass-of-an-object-at-4.68-g.-Which-of-the-following-statements-is-
most-accurate?---ans-✔✔he-first-two-digits-are-measured-and-the-last-digit-is-estimated.
A-student-models-the-constant-speed-motion-of-an-object-with-the-following-equation:
x-=-(4-m/s)-t-+-(-15-m)
Which-of-the-following-descriptions-of-motion-is-consistent-with-this-equation?---ans-
✔✔The-object-starts-at-a-negative-position-and-travels-forwards.
How-much-time-will-it-take-for-an-object-traveling-at-a-constant-speed-of-20-m/s-to-travel-
15-m?---ans-✔✔0.75-s
A-student-models-the-constant-speed-motion-of-an-object-with-the-following-equation:
x-=-(-2-m/s)-t-+-(4-m)
, Which-of-the-following-descriptions-of-motion-is-consistent-with-this-equation?---ans-
✔✔The-object-starts-at-a-positive-position-and-travels-backwards.
Examine-the-velocity-vs.-time-graph-below.-Which-of-the-following-correctly-describes-the-
motion-of-the-object?---ans-✔✔Constant-speed-forwards-and-then-constant-speed-
backward
Convert-35.0-mph-to-m/s.-(1-mi-=-1.6-km)---ans-✔✔15.6-m/s
Which-of-the-following-is-a-vector-measurement?---ans-✔✔Displacement
Convert-4200-cm-to-miles.-(1-mi-=-1.6-km)---ans-✔✔0.026-mi
A-car-travels-forwards-at-a-constant-speed-of-30-m/s-for-5.0-seconds.-How-far-will-the-car-
move-in-this-time?---ans-✔✔150-m
Examine-the-velocity-vs.-time-graph-below.-What-is-the-total-distance?---ans-✔✔8-m
Examine-the-velocity-vs.-time-graph-below.-What-direction-is-the-object-moving-at-t-=-4.0-
s?---ans-✔✔Backwards
A-student-wants-to-compare-a-set-of-measurements-in-order-to-analyze-the-precision-of-
an-instrument.-Which-of-the-following-methods-would-be-most-appropriate?---ans-
✔✔Examine-the-percent-difference-between-the-largest-and-smallest-measured-values
How-much-time-will-it-take-for-a-car-traveling-at-a-velocity-of--4.0-m/s-to-travel-a-distance-of-
30-m?---ans-✔✔7.5-m
A-jogger-starts-at-a-position-of-4.0-m-and-moves-forwards-at-a-constant-rate-ending-at-a-
position-of-12.0-m-at-a-time-4.0-s-later.-What-is-the-speed-of-the-jogger?---ans-✔✔2.0-m/s
A-student-moves-3.0-m-south,-6.0-m-east,-and-1.0-m-north.-What-is-the-angle-of-the-
displacement?---ans-✔✔-18°
The-grid-below-shows-two-vectors-<strong>A</strong>-and-<strong>B</strong>.-What-is-
the-magnitude-of-the-sum-of-the-vectors-<srong>A</strong>+<strong>B</strong>?---ans-
✔✔5.7
A-student-launches-a-rocket-with-some-initial-velocity-v-at-some-angle-θ.-The-rocket-hits-a-
wall-on-its-way-back-down-to-the-ground.-(See-the-diagram-below.)-Which-of-the-following-
statements-is-most-accurate?---ans-✔✔The-speed-of-the-rocket-just-before-it-hits-the-wall-
is-less-than-the-starting-speed-of-the-rocket.
A-student-moves-8.0-m-to-the-west,-6.0-m-to-the-north,-and-10.0-m-to-the-east.-What-is-the-
magnitude-of-the-displacement?---ans-✔✔6.3-m
Examine-the-position-vs.-time-graph-below.-What-is-the-velocity-of-the-object-at-t-=-5.0-s?---
ans-✔✔-5-m/s
A-student-measures-the-mass-of-an-object-at-4.68-g-and-the-volume-of-the-object-at-2.3-
mL.-The-student-calculates-the-density-as-2.03478-g/mL.-A-second-student-disagrees-
with-the-density.-Which-of-the-following-statements-would-explain-why-the-second-student-
disagrees?---ans-✔✔The-number-of-decimals-in-the-answer-does-not-show-proper-
precision.
Examine-the-position-vs.-time-graph-below.-Which-of-the-following-correctly-describes-the-
motion-of-the-object?---ans-✔✔Forwards-at-a-constant-speed-and-then-backward-at-a-
constant-speed
A-car-moving-at-a-constant-25-m/s-travels-for-3.0-seconds.-What-is-the-distance-traveled-
by-the-car?---ans-✔✔75-m
A-student-measures-the-mass-of-an-object-at-4.68-g.-Which-of-the-following-statements-is-
most-accurate?---ans-✔✔he-first-two-digits-are-measured-and-the-last-digit-is-estimated.
A-student-models-the-constant-speed-motion-of-an-object-with-the-following-equation:
x-=-(4-m/s)-t-+-(-15-m)
Which-of-the-following-descriptions-of-motion-is-consistent-with-this-equation?---ans-
✔✔The-object-starts-at-a-negative-position-and-travels-forwards.
How-much-time-will-it-take-for-an-object-traveling-at-a-constant-speed-of-20-m/s-to-travel-
15-m?---ans-✔✔0.75-s
A-student-models-the-constant-speed-motion-of-an-object-with-the-following-equation:
x-=-(-2-m/s)-t-+-(4-m)
, Which-of-the-following-descriptions-of-motion-is-consistent-with-this-equation?---ans-
✔✔The-object-starts-at-a-positive-position-and-travels-backwards.
Examine-the-velocity-vs.-time-graph-below.-Which-of-the-following-correctly-describes-the-
motion-of-the-object?---ans-✔✔Constant-speed-forwards-and-then-constant-speed-
backward
Convert-35.0-mph-to-m/s.-(1-mi-=-1.6-km)---ans-✔✔15.6-m/s
Which-of-the-following-is-a-vector-measurement?---ans-✔✔Displacement
Convert-4200-cm-to-miles.-(1-mi-=-1.6-km)---ans-✔✔0.026-mi
A-car-travels-forwards-at-a-constant-speed-of-30-m/s-for-5.0-seconds.-How-far-will-the-car-
move-in-this-time?---ans-✔✔150-m
Examine-the-velocity-vs.-time-graph-below.-What-is-the-total-distance?---ans-✔✔8-m
Examine-the-velocity-vs.-time-graph-below.-What-direction-is-the-object-moving-at-t-=-4.0-
s?---ans-✔✔Backwards
A-student-wants-to-compare-a-set-of-measurements-in-order-to-analyze-the-precision-of-
an-instrument.-Which-of-the-following-methods-would-be-most-appropriate?---ans-
✔✔Examine-the-percent-difference-between-the-largest-and-smallest-measured-values
How-much-time-will-it-take-for-a-car-traveling-at-a-velocity-of--4.0-m/s-to-travel-a-distance-of-
30-m?---ans-✔✔7.5-m
A-jogger-starts-at-a-position-of-4.0-m-and-moves-forwards-at-a-constant-rate-ending-at-a-
position-of-12.0-m-at-a-time-4.0-s-later.-What-is-the-speed-of-the-jogger?---ans-✔✔2.0-m/s
A-student-moves-3.0-m-south,-6.0-m-east,-and-1.0-m-north.-What-is-the-angle-of-the-
displacement?---ans-✔✔-18°
The-grid-below-shows-two-vectors-<strong>A</strong>-and-<strong>B</strong>.-What-is-
the-magnitude-of-the-sum-of-the-vectors-<srong>A</strong>+<strong>B</strong>?---ans-
✔✔5.7
A-student-launches-a-rocket-with-some-initial-velocity-v-at-some-angle-θ.-The-rocket-hits-a-
wall-on-its-way-back-down-to-the-ground.-(See-the-diagram-below.)-Which-of-the-following-
statements-is-most-accurate?---ans-✔✔The-speed-of-the-rocket-just-before-it-hits-the-wall-
is-less-than-the-starting-speed-of-the-rocket.
