Unformatted text preview: rd, decreasing magnitude
Zero acceleration
40 0 of
100
0% 0% 0% 0% 0% 0% 0% You throw a ball vertically upward. Which statement best describes the direction and magnitude of the ball’s velocity while the ball is still moving up?
1.
2.
3.
4.
5.
6.
7. Upward, constant magnitude
Upward, increasing magnitude
Upward, decreasing magnitude
Downward, constant magnitude
Downward, increasing magnitude
Downward, decreasing magnitude
Zero velocity
0 of
100 40 You throw a ball vertically upward. The ball moves up, reaches its highest point, and finally falls down. Which of the following graphs best represents the ball’s acceleration and velocity vs. time during the process? a v Time Time
v v v
Time Time Time Time 40 Time
0% 0% 0% 0%
D Time a C a 0 of
100 B a D C B A A A car starting from rest speeds up to 30 m/s with a constant
acceleration over a time of 10 seconds. Then, it travels at 30 m/s for
ti
10
Th
it
30
10 seconds, and finally brakes to a stop in 20 seconds with a constant
deceleration. Which of the following graphs represents its graph of
speed versus time? v A v C B v
t t
1.
2.
3.
4. A
B
C
D v t D
t 0 of
5 0% 0% 0% 40
0% Which direction best represents the ball’s acceleration while sliding up the frictionless hill 40 2
3
4 0% 0% 8
ab
ov
e 0% of
th
e 0% 7 0% e 0% 6 0% 5 0% 4 0% 3 0 of
100 2 1
1
2
8
3
7
4
5
6
6
5
7
8
None of the above 1 1.
2.
3.
4.
5.
6.
7.
8.
9. Which graph best represents the ball’s acceleration as a function of time while sliding completely over the frictionless hill? a a
time
1.
2.
3.
4.
5.
6. A
a
B
C
time
D
E
None of the above a
time time 40 a
time
0 of 100
0% 0% 0% 0% 0% 0% A ball sliding up a frictionless hill slows down, stops, and then begins sliding down the same side of the hill that it went up. Which of the following sets of graphs best represents the ball’s acceleration and velocity versus time? ( A) (B)
v
a
Time Time Time Time v
Time Time (C) (D)
0 of 100
0% 0% 0% 0%
D A
B
C
D a v C 1.
2.
3.
4. Time Time B a v A a 40 Which of the following graphs best represents the motion diagram below?
A
B
C
D
E
F x x B D t x E t F 0% t 0% 0% 0% 0% 0% 90
F x t E x C t D t C A B x A 1.
2.
3.
4.
5.
6....
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 Fall '10
 RALF
 Harshad number, Automobile

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