Section 3.2
Motion with Constant Acceleration
Practice Test
1.
A car is accelerated uniformily at the rate of 0.50 m/s
2
for 1.0×
1
s. Its final velocity is 23 m/s. What is the initial velocity?
a.
28 m/s
2
b.
28 m/s
c.
18 m/s
d.
18 m/s
2
Hint
2.
In Figure 3-19, what is the total displacement of the object?
a.
0 m
b.
75.0 m
c.
-25.0 m
d.
500.0 m
Hint
3.
A car with a velocity of 30 m/s is accelerated uniformly at the rate of 2.0 m/s
2
for 10 s. What is its final velocity?
a.
40 m/s
2
b.
50 m/s
c.
40 m/s
d.
50 m/s
2
Hint
4.
If a car is traveling 1.0×10
2
and comes to a stop in 3.0 min, what is the car's acceleration?
a.
- 0.56 m/s
2
b.
0.15 m/s
2
c.
0.56 m/s
2
d.
- 0.15 m/s
2
Hint
5.
In Figure 3-19, what is the displacement of the object between 0.0 and 5.0 s?
a.
150.0 m
b.
5.0 m
c.
30.0 m
d.
75.0 m
Hint
6.
The
a-t
graph corresponding to the
v-t
graph in Figure 3-10a would be ___.
a.
A line beginning at the origin with increasing positive slope
b.
A straight vertical line
c.
A straight horizontal line above the
t
axis
d.
A straight line with a constant positive slope
Hint
7.
Find the uniform acceleration that causes a car's velocity to change from 27 m/s to 45 m/s in a 6.0-s period.
a.
18.0 m/s
b.
3.0 m/s
2
c.
18.0 m/s
2
d.
3.0 m/s
Hint
8.
How far does a car travel in 30.0 s while its velocity is changing from 50.0 km/h to 80.0 km/h at a uniform rate of acceleration?
a.
5.40×10
2
b.
1.95 × 10
3
m
c.
252 m
d.
1.08 × 10
3
m
Hint
9.
What is the minimum length runway needed to accommodate airplanes that can accelerate uniformly at 2.7 m/s
2
and must reach a ground velocity of 64 m/s before they can take off?
a.
7.8×10
3
m
b.
7.8×10
2
m
c.
1.5×10
2
m
d.
1.5×10
3
m
Hint
10.
How long will it take an airplane at rest that accelerates uniformly at 2.5 m/s
2
to reach a ground velocity of 7.0×10
1
m/s that is required for take off?
a.
28 s
b.
11 s
c.
35 s
d.
4 s
Hint
