Which two quantities are needed to determine the average velocity of an object? a. displacement and acceleration distance and elapsed time b. displacement and elapsed time initial speed and final speed C. d.
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
![For items 9 to 12, a ball was thrown vertically upward and returned to the hand after 2.0
9. How much time was taken by the ball to reach its maximum height?
0.5 s
1.0 s
With what initial velocity was the ball thrown?
- 19.6 m/s
10.
11.
12.
a.
b.
15.
C.
-9.8 m/s
d.
What was the velocity of the ball just before it returned
- 19.6 m/s
a.
b.
a.
b.
a.
-9.8 m/s
What was the maximum height reached by the ball?
4.9 m
C.
19.6 m
b.
9.8 m
d.
29.4 m
13.
A girl is riding a bicycle at a constant speed when she dropped a ball. Which set of graphs
represents the horizontal motion of the ball?
a.
b.
a.
b.
a.
b.
C.
d.
C.
d.
C.
For items 14 and 15, consider an airplane flying clockwise in a circular path of radius
20.0 m at a constant speed of 30.0 m/s.
14. What is the magnitude of the centripetal acceleration of the plane?
0 m/s²
13 m/s²
1.5 m/s²
45 m/s²
What is the magnitude of the tangential acceleration of the plane?
0 m/s²
13 m/s²
1.5 m/s²
45 m/s²
d.
C.
d.
C.
d.
1.5 s
2.0 s
9.8 m/s
19.6 m/s
to the hand?
9.8 m/s
19.6 m/s
t
t](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc423423d-0d3e-4fbc-9596-446ac86ab96c%2F3f977fcf-7f6a-4da1-bb3a-024d502846dd%2Fo8u9wl7_processed.jpeg&w=3840&q=75)
![Which two quantities are needed to determine the average velocity of an object?
displacement and acceleration
b.
displacement and elapsed time
distance and elapsed time
initial speed and final speed
d.
2.
A projectile is thrown upward with an initial velocity v at an angle with the horizontal.
Which of the following is true for the projectile at its maximum height?
velocity = 0; acceleration = 0
velocity = 0; acceleration = -g
C.
velocity = vo sin 0; acceleration = 0
d.
velocity =vo cos 0; acceleration = -g
3.
A ball is thrown upward at an angle of 60° with the horizontal. In the absence of air resistance,
its range would be less than that of a projectile thrown at an angle of
10°
C.
b.
30°
d.
4.
A girl runs around a circular track of radius 65 m at a speed of 2 m/s. What is her displacement
after finishing one round?
1.
5.
6.
7.
a.
a.
b.
a.
a.
b.
a.
b.
C.
130 m
0
408 m
65 m
What does a horizontal line on a velocity-time graph represent?
no motion at all
uniform motion
What does the slope of a line tangent to a point on a
accelerated motion give us?
C.
d.
a.
b.
C.
d.
43°
Lenn
a.
b.
uniform motion
What does a horizontal line on a displacement-time graph represent?
no motion at all
70°
C.
d.
uniformly accelerated motion
uniformly decelerated motion
C. uniformly accelerated motion
d.
uniformly decelerated motion
displacement-time graph for a uniformly
acceleration
a.
C.
initial velocity
b.
d.
average velocity
instantaneous velocity
8.
A boat sails at 12.0 m/s across a river flowing due south at 5 m/s. What is the magnitude of
the resultant velocity of the boat?
7.0 m/s
8.5 m/s
13.0 m/s
17.0 m/s](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc423423d-0d3e-4fbc-9596-446ac86ab96c%2F3f977fcf-7f6a-4da1-bb3a-024d502846dd%2F56dx8td_processed.jpeg&w=3840&q=75)
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