Physics Principles and Problems 2009

Chapter 3: Accelerated Motion

Standardized Test Practice

1
The graph shows the velocity of a bicycle as the rider begins to move from a stop.

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Based on the slope of the graph, what is the average acceleration of the bicycle?
A)0.8 m/s2 forward
B)1.3 m/s2 forward
C)2.0 m/s2 forward
D)6.0 m/s2 forward
2
The graph shows the velocity of a bicycle as the rider begins to move from a stop.

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What does the slope of the graph represent?
A)acceleration
B)displacement
C)time
D)velocity
3
A school bus's velocity decreases from 15 m/s to 5 m/s forwards over a period of 10 s. What is the bus's average acceleration?
A)1 m/s2 forward
B)2 m/s2 forward
C)1 m/s2 backward
D)2 m/s2 backward
4
If a race horse accelerates from rest at a constant rate of 3.5 m/s2 north, how long will the horse take to reach a speed of 19 m/s?
  Need a Hint?
A)67 s
B)0.18 s
C)16 s
D)5.4 s
5
A bucket of paint falls from a ladder onto the sidewalk below. If the bucket falls for 0.95 s, what is its velocity just before it hits the sidewalk?
  Need a Hint?
A)4.4 m/s down
B)8.9 m/s down
C)9.3 m/s down
D)10 m/s down
6
A physics student drops a well-wrapped egg off the top of the school roof. If the roof is 4.0 m above the ground, what is the egg's speed just before that egg hits the ground?
  Need a Hint?
A)8.9 m/s
B)0.90 m/s
C)4.9 m/s
D)78.4 m/s
7
Which graph might show the velocity of a ball that is thrown straight up into the air and allowed to fall freely to the ground? (Consider up to be the positive direction.)
A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078807220/617911/ag.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"> (4.0K)</a>

B)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078807220/617911/ah.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"> (4.0K)</a>

C)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078807220/617911/ai.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"> (4.0K)</a>

D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078807220/617911/aj.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"> (4.0K)</a>

8
A car with an initial position of 75 m and an initial velocity of 5 m/s accelerates at an average rate of 4 m/s2 for 2 s. What is the car's position after 2 s?
  Need a Hint?
A)85 m
B)18 m
C)93 m
D)75 m
9
A racing cyclist is traveling at 15.3 km/h when she speeds up with a constant forward acceleration. After 5.00 s, her speed is 31.0 km/h. What is her acceleration?
  Need a Hint?
A)3.14 km/h/s forward
B)4.90 km/h/s forward
C)23.2 km/h/s forward
D)27.0 km/h/s forward
10
How far will a brick starting from rest fall freely in 3.0 seconds?
  Need a Hint?
A)15 m
B)29 m
C)44 m
D)88 m
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