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| 1 | |
A ball is released from rest and rolls down a slope with a constant acceleration of 3.6 m/s2. What was its velocity after 4.8 s? |
| | A) | 1.8 m/s |
| | B) | 17 m/s |
| | C) | 8.4 m/s |
| | D) | 8.5 m/s |
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| 2 | |
A hockey player speeds up from 2.4 m/s to 3.8 m/s in 1.8 s. How far did she travel? |
| | A) | 5.6 m |
| | B) | 7.7 m |
| | C) | 9.2 m |
| | D) | 2.8 m |
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| 3 | |
A car has an initial velocity of 17 m/s[E]. What is its displacement if it accelerates at 2.8 m/s2 for 4.0 s? |
| | A) | 3.8 x 102 m[E] |
| | B) | 1.9 x 102 m[E] |
| | C) | 6.8 x 101 m[E] |
| | D) | 9.0 x 101 m[E] |
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| 4 | |
Which one of the following equations correctly represents the relationship among displacement, acceleration, time, and final velocity? |
| | A) | Δd=vfΔt+½aΔt2 |
| | B) | Δd=vfΔt-½aΔt2 |
| | C) | Δd=vf2-½aΔt2 |
| | D) | Δd=vf2 + 2aΔt |
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| 5 | |
Which two of the displacement vectors shown in the diagram are identical?  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0070922802/536439/pei_physics_Ch3_quiz3_question5.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (102.0K)</a>]]> |
| | A) | ΔdA and ΔdD |
| | B) | ΔdC and ΔdD |
| | C) | ΔdA and ΔdB |
| | D) | ΔdB and ΔdC |
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| 6 | |
A hiker heads out from camp and travels 8.0 km due north. He then travels 10.0 km [E200S] to a lookout point and stops for lunch. Finally he walks 6.0 km[N100E]. In which direction should he now head if he wishes to hike directly back to camp? |
| | A) | [S300W] |
| | B) | [N300E] |
| | C) | [NE] |
| | D) | [SW] |
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| 7 | |
When a vector is multiplied or divided by a scalar, such as time, |
| | A) | A different quantity, and a new direction, is created |
| | B) | A different quantity is created but the direction remains the same |
| | C) | The quantity remains the same, but a new direction is created. |
| | D) | The quantity and the direction remain the same. |
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| 8 | |
A canoeist can paddle at 2.8 m/s in still water. She heads due east across a river which is 538 m wide, and is flowing at 2.0 m/s[N]. How long will it take her to reach the bank on the other side? |
| | A) | 156 s |
| | B) | 160 s. |
| | C) | 190 s. |
| | D) | 270 s. |
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| 9 | |
A swimmer heads at 1.8 m/s[N] across a river but is observed from the river bank to be actually travelling 2.7 m/s[N480E]. What is the velocity of the river? |
| | A) | 2.0 m/s[E] |
| | B) | 0.90 m/s[NE] |
| | C) | 4.1 m/s[N290E] |
| | D) | 2.0 m/s[W] |
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| 10 | |
A river flows at 4.0 m/s [W]. A swimmer wishes to swim straight north across the river. If her maximum swimming speed is 3.0 m/s, what heading should she take? |
| | A) | [N490E] |
| | B) | Such a swim is not possible. |
| | C) | [N490W] |
| | D) | [N530E] |
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