Section 3.1
Acceleration
Practice Test
1.
If the motion in Figure 3-3 continued on at that same acceleration, what would the object's speed be at
t
= 10.00 s?
a.
40.0 m/s
b.
100.0 m/s
c.
25.0 m/s
d.
50.0 m/s
Hint
2.
If a car travels 100 km in a straight line in the first hour of its trip, 100 km in the next hour, and continues in this way, its motion is __________.
a.
uniform
b.
irregular
c.
accelerated
d.
dynamic
Hint
3.
A car moving north at 8.0×10
1
turns and travels south at 65 km/h. What are the magnitude and direction of the change in velocity?
a.
145 km/h, south to north
b.
25 km/h, north to south
c.
145 km/h, north to south
d.
25 km/h
Hint
4.
__________ means that equal displacements occur during successive equal time intervals.
a.
Uniform motion
b.
Uniform acceleration
c.
Average speed
d.
Average acceleration
Hint
5.
Acceleration describes a change in __________.
a.
momentum
b.
mass
c.
velocity
d.
gravity
Hint
6.
In Figure 3-3, if the acceleration were calculated using points at
t
= 0.00 s and
t
= 4.00 s, what would it be?
a.
10.00 m/s
2
b.
2.50 m/s
2
c.
5.00 m/s
2
d.
4.00 m/s
2
Hint
7.
__________ is the change in velocity divided by the time needed for the change to occur.
a.
Average acceleration
b.
Average velocity
c.
Speed
d.
Displacement
Hint
8.
The slope of the line tangent to the curve on a velocity-time graph at a specific instant of time is the __________.
a.
instantaneous acceleration
b.
instantaneous velocity
c.
average velocity
d.
displacement
Hint
